Contact

Dr. Jürgen Lindner

Head
Magnetism
j.lindnerAthzdr.de
Phone: +49 351 260 3221

Recent publications of the FWIN (magnetism) division

complete FWIN publication list

HZDR publication database


2021

Controlled and deterministic creation of synthetic antiferromagnetic domains by focused ion beam irradiation

F. Samad, G. Hlawacek, S. S. P. K. Arekapudi, X. Xu, L. Koch, M. Lenz, O. Hellwig

We study layered synthetic antiferromagnets (SAFs) with out-of-plane interface anisotropy, where the layer-wise antiferromagnetic (AF)
alignment is induced by interlayer exchange coupling (IEC). By applying low energy He+ focused ion beam irradiation to the SAF, a depth-dependent
reduction of the IEC and anisotropy can be achieved due to layer intermixing. As a consequence, after irradiation, a specific field
reversal sequence of the SAF is energetically preferred. When tuning the pristine SAF to exhibit an inverted field reversal, we are thus able to
create AF domains in the irradiated regions. When irradiated with a fluence gradient, these AF domains can be further deterministically
manipulated by an external magnetic field. Among other applications, this could be utilized for engineering a controllable and local magnetic
stray field landscape, for example, at AF domain walls, within the otherwise stray field free environment provided by the SAF.

Keywords: Bubble domains; Focused ion beam; Sputter deposition; Interlayer exchange coupling; Magnetic hysteresis

Related publications


Nonreciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization

M. M. Salazar-Cardona, L. Körber, H. Schultheiß, K. Lenz, A. Thomas, K. Nielsch, A. Kakay, J. A. Otálora

Spin waves (SWs) in magnetic nanotubes have shown interesting nonreciprocal properties in their dispersion relation, group velocity, frequency linewidth, and attenuation lengths. The reported chiral effects are similar to those induced by the Dzyaloshinskii–Moriya interaction but originating from the dipole–dipole interaction. Here, we show that the isotropic-exchange interaction can also induce chiral effects in the SW transport; the so-called Berry phase of SWs. We demonstrate that with the application of magnetic fields, the nonreciprocity of the different SW modes can be tuned between the fully dipolar governed and the fully exchange governed cases, as they are directly related to the underlying equilibrium state. In the helical state, due to the combined action of the two effects, every single sign combination of the azimuthal and axial wave vectors leads to different dispersions, allowing for a very sophisticated tuning of the SW transport. A disentangle- ment of the dipole–dipole and exchange contributions so far was not reported for the SW transport in nanotubes. Furthermore, we propose a device based on coplanar waveguides that would allow to selectively measure the exchange or dipole induced SW nonreciprocities. In the context of magnonic applications, our results might encourage further developments in the emerging field of 3D magnonic devices using curved magnetic membranes.

Keywords: spin wave; nanotube; nonreciprocity; transducer

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  • Secondary publication expected from 30.06.2022

Multistate current-induced magnetization switching in Au/Fe/MgO(001) epitaxial heterostructures

P. Gospodarič, E. Młyńczak, I. Soldatov, A. Kakay, D. E. Bürgler, L. Plucinski, R. Schäfer, J. Faßbender, C. M. Schneider

Magnetization switching using in-plane charge current recently has been widely investigated in heavy metal/ferromagnet bilayers with the switching mechanism usually attributed to the action of the spin-orbit coupling. Here we study in-plane current induced magnetization switching in model epitaxial bilayers that consist of Au(001) and Fe(001) grown on MgO(001). We use the planar Hall effect combined with magnetooptical Kerr effect (MOKE) microscopy to investigate magnetic properties of the bilayers and current-induced switching. We show that a current density beyond 1.4×10^7 A/cm can be employed for reproducible electrical switching of the magnetization between multiple stable states that correspond to different arrangements of magnetic domains with magnetization direction along one of the in-plane easy magnetization axes of the Fe(001) film. Lower current densities result in stable intermediate transversal resistances which are interpreted based on MOKE-microscopy investigations as resulting from the current-induced magnetic domain structure that is formed in the area of the Hall cross. We find that the physical mechanism of the current-induced magnetization switching of the Au/Fe/MgO(001) system at room temperature can be fully explained by the Oersted field, which is generated by the charge current flowing mostly through the Au layer.


Finite-element dynamic-matrix approach for spin-wave dispersions in magnonic waveguides with arbitrary cross section

L. Körber, G. Quasebarth, A. Otto, A. Kakay

We present a numerical approach to efficiently calculate spin-wave dispersions and spatial mode profiles in magnetic waveguides of arbitrarily shaped cross section with any non-collinear equilibrium magnetization which is translationally invariant along the waveguide. Our method is based on the propagating-wave dynamic-matrix approach by Henry et al. and extends it to arbitrary cross sections using a finite-element method. We solve the linearized equation of motion of the magnetization only in a single waveguide cross section which drastically reduces computational effort compared to common three-dimensional micromagnetic simulations. In order to numerically obtain the dipolar potential of individual spin-wave modes, we present a plane-wave version of the hybrid finite-element/boundary-element method by Frekdin and Koehler which, for the first time, we extend to a modified version of the Poisson equation. Our method is applied to several important examples of magnonic waveguides including systems with surface curvature, such as magnetic nanotubes, where the curvature leads to an asymmetric spin-wave dispersion. In all cases, the validity of our approach is confirmed by other methods. Our method is of particular interest for the study of curvature-induced or magnetochiral effects on spin-wave transport but also serves as an efficient tool to investigate standard magnonic problems.

Keywords: spin wave; eigensolver; micromagnetic simulation; dispersion; finite-element method; FEM

Related publications


Robustness of the remanent magnetic domain pattern formation and associated stripe-bubble transitions in Co/Pt multilayers against field sequencing

A. Gentillon, C. Richards, L. A. Ortiz-Flores, J. Metzner, D. Montealegre, M. Healey, K. Cardon, A. Westover, O. Hellwig, K. Chesnel

Thin ferromagnetic [Co/Pt] multilayers with perpendicular magnetic anisotropy exhibit a variety of nanoscopic magnetic domain patternsat remanence, from long interlaced stripes to lattices of bubbles, depending on the multilayer structure but also on the magnetic historyof the sample. For optimized structural parameters, stripe-bubble transitions accompanied by drastic increases in domain density havebeen observed when the magnitude of the previously applied perpendicular fieldHmis finely tuned throughout the hysteresis loop. Here, we investigate the robustness of these morphological transitions against field sequencing and field cycling. We conducted this study on[Co(x)/Pt(7Å)]N=50where x varies from 4 to 60 Å. We mapped the morphological transition withHmvarying from 0 to 9 T, following bothan ascending sequence (0→9 T) and a descending sequence (9 T→0). We found that the optimal fieldHm=H∗at which the domain densityis maximized and its associated maximal density n∗ are not significantly affected by the field sequencing direction. We have also investigatedpossible pumping effects when cycling the applied field at the value H∗. We found that n∗ remains relatively stable through field cycling, andmuch more stable in the bubble state, compared to longer stripe states. The observed robustness of these morphological transitions againstfield sequencing and field cycling is of crucial importance for potential magnetic recording applications.


Microresonators and Microantennas—tools to explore magnetization dynamics in single nanostructures

H. Cansever, J. Lindner

The phenomenon of magnetic resonance and its detection via microwave spectroscopy provide direct insight into the magnetization dynamics of bulk or thin film materials. This allows for direct access to fundamental properties, such as the effective magnetization, g-factor, magnetic anisotropy and the various damping (relaxation) channels that govern the decay of magnetic excitations. Cavity-based and broadband ferromagnetic resonance techniques that detect the microwave absorption of spin systems require a minimum magnetic volume to obtain a sufficient signal-to-noise ratio (S/N). Therefore, conventional techniques typically do not offer the sensitivity to detect individual micro- or nanostructures. A solution to this sensitivity problem is the so-called planar microresonator, which is able to detect even the tiniest absorption signals of magnetic nanostructures, including spin-wave or edge resonance modes. As an example, we describe the microresonator-based detection of spin-wave modes within microscopic strips of ferromagnetic A2 Fe60Al40 that are imprinted into a paramagnetic B2 Fe60Al40-matrix via focused ion-beam irradiation. While microresonators operate at a fixed microwave frequency, a reliable quantification of the key magnetic parameters like the g-factor or spin relaxation times requires investigations within a broad range of frequencies. In this study, we introduce and describe the step from microresonators towards a broadband microantenna approach. It allows for performing broadband magnetic resonance experiments on single nanostructured magnetic objects in a frequency range of 2-18 GHz. We employ this detection scheme to explore the influence of lateral structuring on the magnetization dynamics of a Permalloy strip.

Keywords: ferromagnetic resonance; microantenna; microresonator; magnetic relaxation; thin films; nanosctructures


Theory of three-magnon interaction in a vortex-state magnetic nanodot

R. Verba, L. Körber, K. Schultheiß, H. Schultheiß, V. Tiberkevich, A. Slavin

We use vector Hamiltonian formalism (VHF) to study theoretically three-magnon parametric interaction (or three-wave splitting) in a magnetic disk existing in a magnetic vortex ground state. The three-wave splitting in a disk is found to obey two selection rules: (i) conservation of the total azimuthal number of the resultant spin-wave modes, and (ii) inequality for the radial numbers of interacting modes, if the mode directly excited by the driving field is radially symmetric (i.e. if the azimuthal number of the directly excited mode is m=0). The selection rule (ii), however, is relaxed in the "small" magnetic disks, due to the influence of the vortex core. We also found, that the efficiency of the three-wave interaction of the directly excited mode strongly depends on the azimuthal and radial mode numbers of the resultant modes, that becomes determinative in the case when several splitting channels (several pairs of resultant modes) simultaneously approximately satisfy the resonance condition for the splitting. The good agreement of the VHF analytic calculations with the experiment and micromagnetic simulations proves the capability of the VHF formalism to predict the actual splitting channels and the magnitudes of the driving field thresholds for the three-wave splitting.

Keywords: spin wave; nonlinear; three-magnon interaction; theory; micromagnetic simulation; vortex

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The 2021 Magnonics Roadmap

A. Barman, G. Gubbiotti, S. Ladak, A. O. Adeyeye, M. Krawczyk, J. Gräfe, A. V. Chumak, A. Khitun, D. Nikonev, I. A. Young, V. I. Vasyuchka, B. Hillebrands, S. A. Nikitov, H. Yu, D. Grundler, A. V. Sadovnikov, A. A. Grachev, S. E. Sheshukova, J.-Y. Duquesne, M. Marangolo, G. Csaba, W. Porod, V. E. Demidov, S. Urazhdin, S. O. Demokritov, E. Albisetti, D. Petti, R. Bertacco, H. Schultheiß, V. V. Kruglyak, V. D. Poimanov, S. Sahoo, J. Sinha, T. Moriyama, S. Mizukami, H. Yang, M. Münzenburg, P. Landeros, R. A. Gallardo, G. Carlotti, J.-V. Kim, R. L. Stamps, R. E. Camley, B. Rana, Y. Otani, W. Yu, T. Yu, G. E. W. Bauer, C. Back, G. S. Uhrig, O. V. Dobrovolskiy, S. van Dijken, B. Budinska, H. Qin, C. Adelmann, S. Cotofana, A. Naeemi, B. W. Zingsem, M. Winklhofer

Magnonics is a rather young physics research field in nanomagnetism and nanoscience that addresses the use of spin waves (magnons) to transmit, store, and process information. After several papers and review articles published in the last decade, with a steadily increase in the number of citations, we are presenting the first Roadmap on Magnonics. This a collection of 22 sections written by leading experts in this field who review and discuss the current status but also present their vision of future perspectives. Today, the principal challenges in applied magnonics are the excitation of sub-100 nm wavelength magnons, their manipulation on the nanoscale and the creation of sub-micrometre devices using low-Gilbert damping magnetic materials and the interconnections to standard electronics. In this respect, magnonics offers lower energy consumption, easier integrability and compatibility with CMOS structure, reprogrammability, shorter wavelength, smaller device features, anisotropic properties, negative group velocity, non-reciprocity and efficient tunability by various external stimuli to name a few. Hence, despite being a young research field, magnonics has come a long way since its early inception. This Roadmap represents a milestone for future emerging research directions in magnonics and hopefully it will be followed by a series of articles on the same topic.

Keywords: magnonics; spin waves; roadmap; spin textures; skyrmions; computing


Frequency- and magnetic-field-dependent properties of ordered magnetic nanoparticle arrangements

N. Neugebauer, T. Hache, M. T. Elm, D. M. Hofmann, C. Heiliger, H. Schultheiß, P. J. Klar

We present a frequency and magnetic field dependent investigation of ordered arrangements of 20 nm mag-netic nanoparticles (MNPs) consisting of magnetite (Fe3O4) by employing micro Brillouin light scatteringmicroscopy. We utilized electron beam lithography to prepare hexagonally arranged, circularly shaped MNP-assemblies consisting of a single layer of MNPs using a variant of the Langmuir-Blodgett technique. Bycomparing the results with non-structured, layered superlattices of MNPs, further insight into the influenceof size and geometry of the arrangement on the collective properties is obtained. We show that at low staticexternal field strengths, two signals occur in frequency dependent measurements for both non-structured andstructured assemblies. Enlarging the static external field strength leads to a sharpening of the main signal,while the satellite signal decreases in its intensity and increases in its linewidth. The occurrence of multiplesignals at low external field strengths is also confirmed by sweeping the static external field and keeping theexcitation frequency constant. Micromagnetic simulations unravel the origin of the different signals and theirdependence on the static external field strength, enabling an interpretation of the observed characteristics interms of different local environments of an MNPs forming the MNP assembly.

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Spin-wave dynamics and symmetry breaking in an artificial spin ice

S. Saha, J. Zhou, K. Hofhuis, A. Kakay, V. Scagnoli, L. J. Heyderman, S. Gliga

Artificial spin ices are periodic arrangements of interacting nanomagnets that have been successfully used to investigate emergent phenomena in the presence of geometric frustration. Recently, it has become clear that artificial spin ices equally have the potential to be used as building blocks for creating functional materials, such as magnonic crystals and ratchets, in addition to supporting a large number of programmable magnetic states. In this context, we investigate the magnetization dynamics in a system exhibiting asymmetric magnetostatic interactions owing to locally broken structural symmetry. We find that this gives rise to a rich spectrum that can be tuned through an external field. We also determine the evolution of the observed excitation modes, starting with building blocks and evolving into larger arrays, highlighting the role of symmetry breaking in defining the mode spectrum of the system. Concurrently, the increasing complexity of the spectrum leads to the existence of a large number of modes over a narrow range of frequencies. These results contribute to the understanding of magnetization dynamics in spin ice systems beyond the kagome and square ice geometries with a view towards the realization of reconfigurable magnonic crystals based on spin ices.

Keywords: artificial spin ice; symmetry breaking; spin-wave dynamics; reconfigurable; magnonic crystal

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  • Secondary publication expected from 09.03.2022

Magnetic texture based magnonics

H. Yu, J. Xiao, H. Schultheiß

The spontaneous magnetic orders arising in ferro-, ferri- and antiferromagnets stem from various magnetic interactions. Depending on the interplay and competition among the Heisenberg exchange interaction, Dzyaloshinskii-Moriya exchange interaction, magnetic dipolar interaction and crystal anisotropies, a great variety of magnetic textures may be stabilized, such as magnetic domain walls, vortices, Skyrmions and spiral helical structures. While each of these spin textures responds to external forces in a specific manner with characteristic resonance frequencies, they also interact with magnons, the fundamental collective excitation of the magnetic order, which can propagate in magnetic materials free of charge transport and therefore with low energy dissipation. Recent theories and experiments found that the interplay between spin waves and magnetic textures is particularly interesting and rich in physics. In this review, we introduce and discuss the theoretical framework of magnons living on a magnetic texture background, as well as recent experimental progress in the manipulation of magnons via magnetic textures. The flexibility and reconfigurability of magnetic textures are discussed regarding the potential for applications in information processing schemes based on magnons.

Keywords: magnetic textures; spin waves; magnetization dynamics; Skyrmions; antiferromagnets; Dzyaloshinskii Moria; chiral magnetism; domain walls; vortices

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  • Secondary publication expected from 06.01.2022

Time refraction of spin waves

K. Schultheiß, N. Sato, P. Matthies, L. Körber, K. Wagner, T. Hula, O. Gladii, J. E. Pearson, A. Hoffmann, M. Helm, J. Faßbender, H. Schultheiß

We present an experimental study of time refraction of spin waves propagating in microscopic waveguides under the influence of time-varying magnetic fields. Using space- and time-resolved Brillouin light scattering microscopy, we demonstrate that the broken translational symmetry along the time coordinate can be used to in- or decrease the energy of spin waves during their propagation. This allows for a broadband and controllable shift of the spin-wave frequency. Using an integrated design of spin-wave waveguide and microscopic current line for the generation of strong, nanosecond-long, magnetic field pulses, a conversion efficiency up to 39% of the carrier spin-wave frequency is achieved, significantly larger compared to photonic systems. Given the strength of the magnetic field pulses and its strong impact on the spin-wave dispersion relation, the effect of time refraction can be quantified on a length scale comparable to the spin-wave wavelength. Furthermore, we utilize time refraction to excite spin-wave bursts with pulse durations in the nanosecond range and a frequency shift depending on the pulse polarity.

Keywords: magnetization dynamics; spin waves; time refraction; Brillouin light scattering

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Numerical ferromagnetic resonance experiments in nanosized elements

K. Wagner, L. Körber, S. Stienen, J. Lindner, M. Farle, A. Kakay

We present a numerical approach to obtain the Ferromagnetic Resonance (FMR) spectra of micrometer- and nano-sized magnetic elements by micromagnetic simulations. Mimicking common experimental conditions, a static magnetic field is applied and a linearly polarized oscillating magnetic field is used to excite magnetization dynamics. A continuous single-frequency excitation is utilized, which permits to study the steady-state dynamics in space- and time-domain. This gives direct access to resonance fields, line widths and relative amplitudes as observed in the experiments, which is not easily accessible in pulsed schemes and allows for a one-to-one identification between simulation and experiment. Similar to numerical approaches using pulsed excitations the phases, ellipticity and spatial mode profiles of the spin-wave excitations may also be accessed. Using large excitation powers we then showcase that one can additionally study nonlinear responses by this method such as the nonlinear shift of the resonance fields and the fold-over of the absorption lines. Since the dynamic susceptibility is directly determined from standard outputs of common micromagnetic codes, the presented method is robust, efficient and easy-to-use, adding to its practical importance.

Keywords: Ferromagnetic resonance; Micromagnetic simulations; line width; nonlinear; fold-over

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  • Secondary publication expected from 29.01.2022

Mapping the stray fields of a micromagnet using spin centers in SiC

M. Bejarano, F. J. Trindade Goncalves, M. Hollenbach, T. Hache, T. Hula, Y. Berencen, J. Faßbender, M. Helm, G. Astakhov, H. Schultheiß

We report the use of optically addressable spin qubits in SiC to probe the static magnetic stray fields generated by a ferromagnetic microstructure lithographically patterned on the surface of a SiC crystal. The stray fields cause shifts in the resonance frequency of the spin centers. The spin resonance is driven by a micrometer-sized microwave antenna patterned adjacent to the magnetic element. The patterning of the antenna is done to ensure that the driving microwave fields are delivered locally and more efficiently compared to conventional, millimeter-sized circuits. A clear difference in the resonance frequency of the spin centers in SiC is observed at various distances to the magnetic element, for two different magnetic states. Our results offer a wafer-scale platform to develop hybrid magnon-quantum applications by deploying local microwave fields and the stray field landscape at the micrometer lengthscale.

Keywords: Quantum sensing; Magnonics; Spin qubits in SiC; Microwave circuits; electron beam lithography

Related publications

  • IEEE Magnetics Letters 12(2021), 9380379
    DOI: 10.1109/LMAG.2021.3066341
  • Poster (Online presentation)
    Magnetism and Magnetic Materials Conference 2020 (MMM2020), 02.-06.11.2020, Online, United States

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  • Secondary publication expected from 17.03.2022

Direct Imaging of Distorted Vortex Structure and Vortex-Antivortex Mediated Vortex Annihilation In Exchange Coupled Ferromagnetic/Antiferromagnetic Disk Structures

S. S. P. K. Arekapudi, B. Böhm, L. Ramasubramanian, F. Ganss, P. Heinig, S. Stienen, C. Fowley, K. Lenz, A. M. Deac, M. Albrecht, O. Hellwig

Topological spin textures such as skyrmions, merons, and vortices in antiferromagnetic (AFM)/ ferromagnetic (FM) materials are actively explored for utilization in future data storage and signal processing devices. An emergent half-integer spin texture such as a magnetic vortex can be stabilized in a soft magnetic NiFe disk structure. Due to the topological nature, the unwinding of the magnetic vortex phase is mediated by the dynamic creation and subsequent annihilation of magnetic singularities, such as Bloch points. This process enables the formation of intermediate topological phases such as vortex-antivortex (V-AV) pairs and edge states. Interfacial interactions between an AFM and a topologically non-trivial spin structure of a FM can stabilize and extend the lifetime of V-AV phases, which are typically considered intrinsic and dynamic are imaged using high-resolution in-field magnetic force microscopy. Additionally, these interactions are used to protect the emerged chirality in an otherwise degenerate chiral spin system, rather than to introduce a preferred chirality.

Keywords: Topological defects; Vortex-Antivortex pairs; Antiferromagnet/Ferromagnet; Chirality in magnetism; High resolution magnetic imaging; Magnetic Vortex

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Inertial spin dynamics in ferromagnets

N. Kumar, N. Awari, S. Kovalev, D. Polly, N. Z. Hagström, S. S. P. K. Arekapudi, A. Semisalova, K. Lenz, B. W. Green, J.-C. Deinert, I. Ilyakov, M. Chen, M. Bawatna, V. Scalera, M. D’Aquino, C. Serpico, O. Hellwig, W. Jean-Eric, M. Gensch, S. Bonetti

The understanding of how spins move at pico- and femtosecond time scales is the goal of much of modern research in condensed matter physics, with implications for ultrafast and more energy-efficient data storage. However, the limited comprehension of the physics behind this phenomenon has hampered the possibility of realising a commercial technology based on it. Recently, it has been suggested that inertial effects should be considered in the full description of the spin dynamics at these ultrafast time scales, but a clear observation of such effects in ferromagnets is still lacking. Here, we report the first direct experimental evidence of inertial spin dynamics in ferromagnetic thin films in the form of a nutation of the magnetisation at a frequency of approximately 0.6 THz. This allows us to evince that the angular momentum relaxation time in ferromagnets is on the order of 10 ps.

Keywords: Magnetisation; ultrafast spin dynamics; ferromagnetic thin films

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Self-stabilizing exchange-mediated spin transport

T. Schneider, D. Hill, A. Kakay, K. Lenz, J. Lindner, J. Faßbender, P. Upadhyaya, Y. Liu, K. Wang, Y. Tserkovnyak, I. N. Krivorotov, I. Barsukov

Long-range spin transport in magnetic systems can be achieved by means of exchange-mediated spin textures with robust topological winding - a phenomenon referred to as spin superfluidity. Its experimental signatures have been discussed in antiferromagnets which are nearly free of dipolar interaction. In ferromagnets, which present with non-negligible dipole fields, however, realization of such spin transport has remained a challenge. Using micromagnetic simulations, we investigate exchange-mediated spin transport in extended thin ferromagnetic films. We uncover a two-fluidstate, in which the long-range spin transport by spin textures co-exists with and is stabilized by spin waves, as well as a soliton-screened spin transport regime at high spin injection biases. Both states are associated with distinct spin texture reconstructions near the spin injection region and sustain spin transport over large distances.

Keywords: Spin waves; superfluidity; bosons; micromagnetism; dipole-dipole interaction; Landau instability

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2020

A. Smith, K. Sobotkiewich, A. Khan, E. A. Montoya, L. Yang, Z. Duan, T. Schneider, K. Lenz, J. Lindner, K. An, X. Li, I. N. Krivorotov
Dimensional crossover in spin Hall oscillators
Phys. Rev. B 102, 054422 (2020)
DOI: 10.1103/PhysRevB.102.054422

T. Huang, V. R. Misko, S. Gobeil, X. Wang, F. Nori, J. Schütt, J. Fassbender, G. Cuniberti, D. Makarov, L. Baraban
Inverse Solidification Induced by Active Janus Particles
Adv. Funct. Mater., 2003851 (2020)
DOI: 10.1002/adfm.202003851

E. Baek, N. Ranjan Das, C. Vittorio Cannistraci, T. Rim, G. Santiago Cañón Bermúdez, K. Nych, H. Cho, K. Kim, C.-K. Baek, D. Makarov, R. Tetzlaff, L. Chua, L. Baraban, G. Cuniberti
Intrinsic plasticity of silicon nanowire neurotransistors for dynamic memory and learning functions
Nature Electronics 3, 398 (2020)
DOI: 10.1038/s41928-020-0412-1

T. Hula, K. Schultheiß, A. Buzdakov, L. Körber, M. Bejarano, L. Flacke, L. Liensberger, M. Weiler, J. M. Shaw, H. T. Nembach, J. Faßbender, H. Schultheiß
Nonlinear losses in magnon transport due to four-magnon scattering
Appl. Phys. Lett. 117, 042404 (2020)
DOI: 10.1063/5.0015269

J. Llandro, D. M. Love, A. Kovács, J. Caron, K. N. Vyas, A. Kakay, R. Salikhov, K. Lenz, J. Faßbender, M. R. J. Scherer, C. Cimorra, U. Steiner, C. H. W. Barnes, R. E. Dunin-Borkowski, S. Fukami, H. Ohno
Visualizing Magnetic Structure in 3D Nanoscale Ni–Fe Gyroid Networks
Nano Lett. 20, 3642 (2020)
DOI: 10.1021/acs.nanolett.0c00578

S. Pile, M. Buchner, V. Ney, T. Schaffers, K. Lenz, R. Narkovic, J. Lindner, H. Ohldag, A. Ney
Direct imaging of the ac component of the pumped spin polarization with element specificity
Phys. Rev. Appl. 14, 034005 (2020)
DOI: 10.1103/PhysRevApplied.14.034005

T. Huang, S. Gobeil, X. Wang, V. Misko, F. Nori, W. de Malsche, J. Faßbender, D. Makarov, G. Cuniberti, L. Baraban
Anisotropic exclusion effect between photocatalytic Ag/AgCl Janus particles and passive beads in a dense colloidal matrix
Langmuir 36, 7091 (2020)
DOI: 10.1021/acs.langmuir.0c00012

J. Lumetzberger, M. Buchner, S. Pile, V. Ney, W. Gaderbauer, N. Daffé, M. V. Moro, D. Primetzhofer, K. Lenz, A. Ney
Influence of structure and cation distribution on magnetic anisotropy and damping in Zn/Al doped nickel ferrites
Phys. Rev. B 102, 054402 (2020)
DOI: 10.1103/PhysRevB.102.054402

C. Wang, C.-H. Chang, A. Herklotz, C. Chen, F. Ganss, U. Kentsch, D. Chen, X. Gao, Y.-J. Zeng, O. Hellwig, M. Helm, S. Gemming, Y.-H. Chu, S. Zhou
Topological Hall effect in single thick SrRuO3 layers induced by defect engineering
Adv. Electron. Mater. (2020)
DOI: 10.1002/aelm.202000184

T. Hache, Y. Li, T. Weinhold, B. Scheumann, F. J. Trindade Goncalves, O. Hellwig, J. Faßbender, H. Schultheiß
Bipolar spin Hall nano-oscillators
Appl. Phys. Lett. 116, 192405 (2020)
DOI: 10.1063/5.0008988

B. Eggert, A. Schmeink, J. Lill, M. O. Liedke, U. Kentsch, M. Butterling, A. Wagner, S. Pascarelli, K. Potzger, J. Lindner, T. Thomson, J. Fassbender, K. Ollefs, W. Keune, R. Bali, H. Wende
Magnetic response of FeRh to static and dynamic disorder
RSC Adv. 10, 14386 (2020)
DOI: 10.1039/D0RA01410A

O. Pylypovskyi, V. P. Kravchuk, O. Volkov, J. Faßbender, D. Sheka, D. Makarov
Unidirectional tilt of domain walls in equilibrium in biaxial stripes with Dzyaloshinskii–Moriya interaction
Appl. Phys. Lett. 53, 395003 (2020)
DOI: 10.1088/1361-6463/ab95bd

L. Ramasubramanian, A. Kákay, C. Fowley, O. Yildirim, P. Matthes, S. Sorokin, A. Titova, D. Hilliard, R. Böttger, R. Hübner, S. Gemming, S. E. Schulz, F. Kronast, D. Makarov, J. Faßbender, A. M. Deac
Tunable magnetic vortex dynamics in ion-implanted permalloy disks
ACS Appl. Mater. Interfaces 12, 27812 (2020)
DOI: 10.1021/acsami.0c08024

O. Yildirim, D. Hilliard, S. S. P. K. Arekapudi, C. Fowley, H. Cansever, L. Koch, L. Ramasubramanian, S. Zhou, R. Böttger, J. Lindner, J. Faßbender, O. Hellwig, A. M. Deac
Ion-irradiation-induced cobalt/cobalt oxide heterostructures: printing 3D interfaces
ACS Appl. Mater. Interfaces 12, 9858 (2020)
DOI: 10.1021/acsami.9b13503

D. D. Sheka, O. Pylypovskyi, P. Landeros, Y. Gaididei, A. Kakay, D. Makarov
Nonlocal chiral symmetry breaking in curvilinear magnetic shells
Communications Physics 3, 128 (2020)
DOI: 10.1038/s42005-020-0387-2

H. Zhong, M. Ghorbani-Asl, K. H. Ly, J. Ge, J. Zhang, M. Wang, Z. Liao, D. Makarov, E. Zschech, E. Brunner, I. M. Weidinger, J. Zhang, A. Krasheninnikov, S. Kaskel, R. Dong, X. Feng
Synergistic Electroreduction of Carbon Dioxide to Carbon Monoxide on Bimetallic Layered Conjugated Metal-Organic Frameworks
Nat. Commun. 11, 1409 (2020)
DOI: 10.1038/s41467-020-15141-y

M. Melzer, D. Makarov, O. G. Schmidt
A review on stretchable magnetic field sensorics
J. Phys. D Appl. Phys. 53, 083002 (2020)
DOI: 10.1088/1361-6463/ab52cf

S. Sorokin, R. Gallardo, C. Fowley, K. Lenz, A. Titova, G. Dennehy, G. Atcheson, K. Rode, J. Faßbender, J. Lindner, A. M. Deac
Magnetization dynamics in synthetic antiferromagnets: the role of dynamical energy and mutual spin-pumping
Phys. Rev. B 101, 14410 (2020)
DOI: 10.1103/PhysRevB.101.144410

T. Hache, M. Vaňatka, L. Flajšman, T. Weinhold, T. Hula, O. Ciubotariu, M. Albrecht, B. Arkook, I. Barsukov, L. Fallarino, O. Hellwig, J. Faßbender, M. Urbánek, H. Schultheiß
Freestanding and positionable microwave-antenna device for magneto-optical spectroscopy experiments
Phys. Rev. Appl. 13, 054009 (2020)
DOI: 10.1103/PhysRevApplied.13.054009

C. Dubs, O. Surzhenko, R. Thomas, J. Osten, T. Schneider, K. Lenz, J. Grenzer, R. Hübner, W. Elke
Low damping and microstructural perfection of sub-40nm-thin yttrium iron garnet films grown by liquid phase epitaxy
Phys. Rev. Mater. 4, 024416 (2020)
DOI: 10.1103/PhysRevMaterials.4.024416

B. Dieny, I. L. Prejbeanu, K. Garello, P. Gambardella, P. Freitas, R. Lehndorff, W. Raberg, U. Ebels, S. O. Demokritov, J. Akerman, A. Deac, P. Pirro, C. Adelmann, A. Anane, A. V. Chumak, A. Hiroata, S. Mangin, M. Cengiz Onbaşlı, M. D’Aquino, G. Prenat, G. Finocchio, L. Lopez Diaz, R. Chantrell, O. Chubykalo-Fesenko, P. Bortolotti
Opportunities and challenges for spintronics in the microelectronic industry
Nature Electronics 3, 446 (2020)
DOI: 10.1038/s41928-020-0461-5

J. Ehrler, B. Sanyal, J. Grenzer, S. Zhou, R. Böttger, H. Wende, J. Lindner, J. Faßbender, C. Leyens, K. Potzger, R. Bali
Magneto-structural correlations in a systematically disordered B2 lattice
New J. Phys. 22, 073004 (2020)
DOI: 10.1088/1367-2630/ab944a


2019

Concept of artificial magnetoelectric materials via geometrically controlling curvilinear helimagnets
O. Volkov, U. K. Rößler, J. Faßbender, D. Makarov
J. Phys. D Appl. Phys. 52, 345001 (2019)
DOI: 10.1088/1361-6463/ab2368

Experimental Observation of Exchange-Driven Chiral Effects in Curvilinear Magnetism
O. Volkov, A. Kakay, K. Florian, J. I. Mönch, M. Mohamad-Assaad, J. Faßbender, D. Makarov
Phys. Rev. Lett. 123, 077201 (2019)
DOI: 10.1103/PhysRevLett.123.077201

Thermodynamics and determination of the exchange stiffness of asymmetrically sandwiched ultrathin ferromagnetic films with perpendicular anisotropy
I. Iastremskyi, O. Volkov, M. Kopte, T. Kosub, S. Stienen, K. Lenz, J. Lindner, J. Faßbender, B. A. Ivanov, D. Makarov
Phys. Rev. Appl. 12, 064038 (2019)
DOI: 10.1103/PhysRevApplied.12.064038

Gilbert damping in NiFeGd compounds: Ferromagnetic resonance versus time-resolved spectroscopy
R. Salikhov, A. Alekhin, T. Parpiiev, T. Pezeril, D. Makarov, R. Abrudan, R. Meckenstock, F. Radu, M. Farle, H. Zabel, V. V. Temnov
Phys. Rev. B 99, 104412 (2019)
DOI: 10.1103/PhysRevB.99.104412

Finite-size effects in ultrafast remagnetization dynamics of FePt
L. Willig, A. von Reppert, M. Deb, F. Ganss, O. Hellwig, M. Bargheer
Phys. Rev. B 100, 224408 (2019)
DOI: 10.1103/PhysRevB.100.224408

Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn₃Sn
H. Reichlova, T. Janda, J. Godinho, A. Markou, D. Kriegner, R. Schlitz, J. Zelezny, Z. Soban, M. Bejarano, H. Schultheiß, P. Nemec, T. Jungwirth, C. Felser, J. Wunderlich, S. Goennenwein
Nat. Commun. 10, 5459 (2019)
DOI: 10.1038/s41467-019-13391-z

Spectroscopic ellipsometry and magneto-optical Kerr effect spectroscopy study of thermally treated Co60Fe20B20 thin films
M. Hoffmann, A. Sharma, P. Matthes, S. Okano, O. Hellwig, R. Ecke, D. Zahn, G. Salvan, S. Schulz
J. Phys.: Condens. Matter 32, 055702 (2019)
DOI: 10.1088/1361-648X/ab4d2f

Femtosecond X-ray induced changes of the electronic and magnetic response of solids from electron redistribution
D. Higley, A. Reid, Z. Chen, L. Le Guyader, O. Hellwig, A. Lutman, T. Liu, P. Shafer, T. Chase, G. Dakovski, A. Mitra, E. Yuan, J. Schlappa, H. Dürr, W. Schlotter, J. Stöhr
Nat. Commun. 10, 5289 (2019)
DOI: 10.1038/s41467-019-13272-5

Antiferromagnetic domain wall control via surface spin flop in fully tunable synthetic antiferromagnets with perpendicular magnetic anisotropy
B. Böhm, L. Fallarino, D. Pohl, B. Rellinghaus, K. Nielsch, N. S. Kiselev, O. Hellwig
Phys. Rev. B 100, 140411 (2019)
DOI: 10.1103/PhysRevB.100.140411

Independent Geometrical Control of Spin and Charge Resistances in Curved Spintronics
K. S. Das, D. Makarov, P. Gentile, M. Cuoco, B. J. van Wees, C. Ortix, I. J. Vera-Marun
Nano Lett. 19, 6839 (2019)
DOI: 10.1021/acs.nanolett.9b01994

Strain Anisotropy and Magnetic Domains in Embedded Nanomagnets
M. Nord, A. Semisalova, A. Kákay, G. Hlawacek, I. Maclaren, V. Liersch, O. Volkov, D. Makarov, G. W. Paterson, K. Potzger, J. Lindner, J. Faßbender, D. Mcgrouther, R. Bali
Small 15, 1904738 (2019)
DOI: 10.1002/smll.201904738

Implantable highly compliant devices for heating of internal organs: towards cancer treatment
G. S. Cañón Bermudez, A. Kruv, T. Voitsekhivska, I. Hochnadel, A. Lebanov, A. Potthoff, J. Fassbender, T. Yevsa, D. Makarov
Adv. Eng. Mater. 21, 1900407 (2019)
DOI: 10.1002/adem.201900407

A bimodal soft electronic skin for tactile and touchless interaction in real time
J. Ge, X. Wang, M. Drack, O. Volkov, M. Liang, G. S. Cañón Bermúdez, R. Illing, C. Wang, S. Zhou, J. Fassbender, M. Kaltenbrunner, D. Makarov
Nat. Commun. 10, 4405 (2019)
DOI: 10.1038/s41467-019-12303-5

Spin Hall magnetoresistance in heterostructures consisting of noncrystalline paramagnetic YIG and Pt
M. Lammel, R. Schlitz, K. Geishendorf, D. Makarov, T. Kosub, S. Fabretti, H. Reichlova, R. Huebner, K. Nielsch, A. Thomas, S. T. B. Goennenwein
Appl. Phys. Lett. 114, 252402 (2019)
DOI: 10.1063/1.5090098

Magnetization Dynamics of an Individual Single-Crystalline Fe-Filled Carbon Nanotube
K. Lenz, R. Narkowicz, K. Wagner, C. F. Reiche, J. Körner, T. Schneider, A. Kákay, H. Schultheiss, D. Suter, B. Büchner, J. Fassbender, T. Mühl, J. Lindner
Small 15, 1904315 (2019)
DOI: 10.1002/smll.201904315

Strain-induced perpendicular magnetic anisotropy and Gilbert damping of Tm3Fe5O12 thin films
O. Ciubotariu, A. Semisalova, K. Lenz, M. Albrecht
Sci Rep 9, 17474 (2019)
DOI: 10.1038/s41598-019-53255-6

Synthesis of Mg and Zn diolates and their use in metal oxide deposition
P. Frenzel, A. Preuß, J. Bankwitz, C. Georgi, F. Ganss, L. Mertens, S. Schulz, O. Hellwig, M. Mehring, H. Lang
RSC Adv. 9, 10657 (2019)
DOI: 10.1039/C9RA00585D

High spin-wave propagation length consistent with low damping in a metallic ferromagnet
L. Flacke, L. Liensberger, M. Althammer, H. Huebl, S. Geprägs, K. Schultheiß, A. Buzdakov, T. Hula, H. Schultheiß, E. R. J. Edwards, H. T. Nembach, J. M. Shaw, R. Gross, M. Weiler
Appl. Phys. Lett. 115, 122402 (2019)
DOI: 10.1063/1.5102132

Nonlinear ferromagnetic resonance in the presence of 3-magnon scattering in magnetic nanostructures
D. V. Slobodianiuk, G. A. Melkov, K. Schultheiß, H. Schultheiß, R. V. Verba
IEEE Magn. Lett. 10, 6103405 (2019)
DOI: 10.1109/LMAG.2019.2913132

Nanomagnetism of Magnetoelectric Granular Thin-Film Antiferromagnets
P. Appel, B. J. Shields, T. Kosub, N. Hedrich, R. Hübner, J. Fassbender, D. Makarov, P. Maletinsky
Nano Lett. 19, 1682 (2019)
DOI: 10.1021/acs.nanolett.8b04681

Zero-field dynamics stabilized by in-plane shape anisotropy in MgO-based spin-torque oscillators
E. Kowalska, A. Kákay, C. Fowley, V. Sluka, J. Lindner, J. Fassbender, A. M. Deac
J. Appl. Phys. 125, 083902 (2019)
DOI: 10.1063/1.5081036

Effect of insertion layer on electrode properties in magnetic tunnel junctions with a zero-moment half-metal
A. Titova, C. Fowley, E. Clifford, Y.-C. Lau, K. Borisov, D. Betto, G. Atcheson, R. Hübner, C. Xu, P. Stamenov, M. Coey, K. Rode, J. Lindner, J. Fassbender, A. M. Deac
Sci Rep 9, 4020 (2019)
DOI: 10.1038/s41598-019-40609-3

Characterization of Continuous Wave Laser-Induced Thermal Gradients in Magnetic Tunnel Junctions Integrated Into Microresonators via COMSOL Simulations
H. Cansever, J. Lindner, T. Huebner, A. Niesen, G. Reiss, J. Faßbender, A. M. Deac
IEEE T. Magn. 55 (2019)
DOI: 10.1109/TMAG.2019.2891903

Tuning Ferromagnetic Resonance via Disorder/Order Interfaces
T. Schneider, K. Lenz, A. Semisalova, J. Gollwitzer, J. Heitler-Klevans, K. Potzger, J. Fassbender, J. Lindner, R. Bali
J. Appl. Phys. 125, 195302 (2019)
DOI: 10.1063/1.5088797

Reconfigurable spin-wave non-reciprocity induced by dipolar interaction in a coupled ferromagnetic bilayer
R. A. Gallardo, T. Schneider, A. K. Chaurasiya, A. Oelschlägel, S. S. P. K. Arekapudi, A. Roldáan-Molina, R. Hübner, K. Lenz, A. Barman, J. Fassbender, J. Lindner, O. Hellwig, P. Landeros
Phys. Rev. Appl. 12, 034012 (2019)
DOI: 10.1103/PhysRevApplied.12.034012

Ion induced ferromagnetism combined with self-assembly for large area magnetic modulation of thin films
M. Krupinski, R. Bali, D. Mitin, P. Sobieszczyk, J. Gregor-Pawlowski, A. Zarzycki, R. Böttger, M. Albrecht, K. Potzger, M. Marszałek
Nanoscale 11, 8930 (2019)
DOI: 10.1039/c8nr10011j

Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators
T. Hache, T. Weinhold, K. Schultheiss, J. Stigloher, F. Vilsmeier, C. Back, S. S. P. K. Arekapudi, O. Hellwig, J. Fassbender, H. Schultheiss
Appl. Phys. Lett. 114, 102403 (2019)
DOI: 10.1063/1.5082692

Domain wall-based spin-Hall nano-oscillators
N. Sato, K. Schultheiß, L. Körber, N. Puwenberg, T. Mühl, A. A. Awad, S. S. P. K. Arekapudi, O. Hellwig, J. Faßbender, H. Schultheiß
Phys. Rev. Lett. 123, 057204 (2019)
DOI: 10.1103/PhysRevLett.123.057204

Excitation of whispering gallery magnons in a magnetic vortex
K. Schultheiss, R. Verba, F. Wehrmann, K. Wagner, L. Körber, T. Hula, T. Hache, A. Kákay, A. A. Awad, V. Tiberkevich, A. N. Slavin, J. Fassbender, H. Schultheiss
Phys. Rev. Lett. 122, 097202 (2019)
DOI: 10.1103/PhysRevLett.122.097202

The role of open-volume defects in the annihilation of antisites in a B2-ordered alloy
J. Ehrler, M. O. Liedke, J. Cizek, R. Boucher, M. Butterling, S. Zhou, R. Böttger, E. Hirschmann, T. T. Trinh, A. Wagner, J. Lindner, J. Fassbender, C. Leyens, K. Potzger, R. Bali
Acta Mater. 176, 167 (2019)
DOI: 10.1016/j.actamat.2019.06.037

Highly compliant planar Hall effect sensor with sub 200 nT sensitivity
P. Granell, G. Wang, G. S. Canon Bermudez, T. Kosub, F. Golmar, L. Steren, J. Fassbender, D. Makarov
npj Flexible electronics 3, 3 (2019)
DOI: 10.1038/s41528-018-0046-9

Experimental and Theoretical Study of Curvature Effects in Parabolic Nanostripes
O. M. Volkov, F. Kronast, I. Mönch, M.-A. Mawass, A. Kákay, J. Fassbender, D. Makarov
Phys. Status Solidi 13, 1800309 (2019)
DOI: 10.1002/pssr.201800309

Spin-wave nonreciprocity on magnetization-graded ferromagnetic films
R. A. Gallardo, P. Alvarado-Seguel, T. Schneider, C. Gonzalez-Fuentes, A. Roldán-Molina, K. Lenz, J. Lindner, P. Landeros
New J. Phys. 21, 033026 (2019)
DOI: 10.1088/1367-2630/ab0449

Structure-property relationship of Co2MnSi thin films in response to He+-irradiation
F. Hammerath, R. Bali, R. Hübner, M. R. D. Brandt, S. Rodan, K. Potzger, R. Böttger, Y. Sakuraba, B. Büchner, S. Wurmehl
Sci Rep 9, 2766 (2019)
DOI: 10.1038/s41598-019-39435-4

Tunnel magnetoresistance angular and bias dependence enabling tuneable wireless communication
E. Kowalska, A. Fukushima, V. Sluka, C. Fowley, A. Kákay, Y. Aleksandrov, J. Lindner, J. Fassbender, S. Yuasa, A. M. Deac
Sci Rep 9, 9541 (2019)
DOI: 10.1038/s41598-019-45984-5

Emission and Propagation of Multi-Dimensional Spin Waves in Anisotropic Spin Textures
V. Sluka, T. Schneider, R. A. Gallardo, A. Kakay, M. Weigand, T. Warnatz, R. Mattheis, A. Roldan-Molina, P. Landeros, V. Tiberkevich, A. Slavin, G. Schütz, A. Erbe, A. Deac, J. Lindner, J. Fassbender, J. Raabe, S. Wintz
Nat. Nanotechnol. 14, 328 (2019)
DOI: 10.1038/s41565-019-0383-4

Flat Bands, Indirect Gaps, and Unconventional Spin-Wave Behavior Induced by a Periodic Dzyaloshinskii-Moriya Interaction
R. A. Gallardo, D. Cortés-Ortuno, T. Schneider, A. Roldán-Molina, F. Ma, K. Lenz, H. Fangohr, J. Lindner, P. Landeros
Phys. Rev. Lett. 122, 067204 (2019)
DOI: 10.1103/PhysRevLett.122.067204

Spin-Wave Modes in Transition from a Thin Film to a Full Magnonic Crystal
M. Langer, R. A. Gallardo, T. Schneider, S. Stienen, A. Roldán-Molina, Y. Yuan, K. Lenz, J. Lindner, P. Landeros, J. Fassbender
Phys. Rev. B 99, 024426 (2019)

Control of domain structure and magnetization reversal in thick Co/Pt multilayers
L. Fallarino, A. Oelschlägel, J. A. Arregi, A. Bashkatov, F. Samad, B. Böhm, K. Chesnel, O. Hellwig
Phys. Rev. B 99, 024431 (2019)

Dynamic Imaging of the Delay-and Tilt-Free Motion of Neel Domain Walls in Perpendicularly Magnetized Superlattices
S. Finizio, S. Wintz, K. Zeissler, A. V. Sadovnikov, S. Mayr, S. A. Nikitov, C. H. Marrows, J. Raabe
Nano Lett. 19, 375 (2019)


2018

270. Hydrogen storage in Mg2FeSi alloy thin films depending on the Fe-to-Si ratio measured by conversion electron Mössbauer spectroscopy
T. T. Trinh, K. Asano, R. Heller, H. Reuther, J. Grenzer, H. Schreuders, B. Dam, K. Potzger
Nucl. Instrum. Meth. B 434, 109 (2018)

269.Chiral Skyrmion and Skyrmionium States Engineered by the Gradient of Curvature
O. V. Pylypovskyi, D. Makarov, V. P. Kravchuk, Y. Gaididei, A. Saxena, D. D. Sheka
Phys. Rev. Appl. 10, 064057 (2018)

268. Controlled coexcitation of direct and indirect ultrafast demagnetization in Co/Pd multilayers with large perpendicular magnetic anisotropy
S. Pan, O. Hellwig, A. Barman
Phys. Rev. B 98, 214436 (2018)

267. Anomalous Hall-like transverse magnetoresistance in Au thin films on Y3Fe5O12
T. Kosub, S. Velez, J. M. Gomez-Perez, L. E. Hueso, J. Fassbender, F. Casanova, D. Makarov
Appl. Phys. Lett. 113, 222409 (2018)

266. Electronic-skin compasses for geomagnetic field driven artificial magnetoception and interactive electronics
G. S. Cañón Bermúdez, H. Fuchs, L. Bischoff, J. Fassbender, D. Makarov
Nature Electronics 1, 589 (2018)

265. Beyond a phenomenological description of magnetostriction
A. H. Reid, X. Shen, P. Maldonado, T. Chase, E. Jal, P. W. Granitzka, K. Carva, R. K. Li, J. Li, L. Wu, T. Vecchione, T. Liu, Z. Chen, D. J. Higley, N. Hartmann, R. Coffee, J. Wu, G. L. Dakovski, W. F. Schlotter, H. Ohldag, Y. K. Takahashi, V. Mehta, O. Hellwig, A. Fry, Y. Zhu, J. Cao, E. E. Fullerton, J. Stöhr, P. M. Oppeneer, X. J. Wang, H. A. Dürr
Nat. Commun. 9, 388 (2018)

264. Measuring the thermal properties of anisotropic materials using beam-offset frequency domain thermoreflectance
M. Rahman, M. Shahzadeh, P. Braeuninger-Weimer, S. Hofmann, O. Hellwig, S. Pisana
J. Appl. Phys. 123, 245110 (2018)

263. High-frequency measurements of thermophysical properties of thin films using a modified broad-band frequency domain thermoreflectance approach
M. Shahzadeh, M. Rahman, O. Hellwig, S. Pisana
Rev. Sci. Instrum. 89, 084905 (2018)

262. Ultrafast laser generated strain in granular and continuous FePt thin films
A. von Reppert, L. Willig, J.-E. Pudell, M. Rössle, W. Leitenberger, M. Herzog, F. Ganss, O. Hellwig, M. Bargheer
Appl. Phys. Lett. 113, 123101 (2018)

261. Ultrafast Self-Induced X-Ray Transparency and Loss of Magnetic Diffraction
Z. Chen, D. J. Higley, M. Beye, M. Hantschmann, V. Mehta, O. Hellwig, A. Mitra, S. Bonetti, M. Bucher, S. Carron, T. Chase, E. Jal, R. Kukreja, T. Liu, A. H. Reid, G. L. Dakovski, A. Föhlisch, W. F. Schlotter, H. A. Dürr, J. Stöhr
Phys. Rev. Lett. 121, 137403 (2018)

260. Visible Light Actuated Efficient Exclusion Between Plasmonic Ag/AgCl Micromotors and Passive Beads
X. Wang, L. Baraban, V. R. Misko, F. Nori, T. Huang, G. Cuniberti, J. Fassbender, D. Makarov
Small 14, 1802537 (2018)

259. High-Motility Visible Light-Driven Ag/AgCl Janus Micromotors
X. Wang, L. Baraban, A. Nguyen, J. Ge, V. R. Misko, J. Tempere, F. Nori, P. Formanek, T. Huang, G. Cuniberti, J. Fassbender, D. Makarov
Small, 1803613 (2018)

258. Injection locking of multiple auto-oscillation modes in a tapered nanowire spin Hall oscillator
K. Wagner, A. Smith, T. Hache, J.-R. Chen, L. Yang, E. Montoya, K. Schultheiss, J. Lindner, J. Fassbender, I. Krivorotov, H. Schultheiss
Sci Rep 8, 16040 (2018)

257. Geometry-induced motion of magnetic domain walls in curved nanostripes
K. V. Yershov, V. P. Kravchuk, D. D. Sheka, O. V. Pylypovskyi, D. Makarov, Y. Gaididei
Physical Review B 98, 060409 (2018)

256. Localization of magnon modes in a curved magnetic nanowire
Y. Gaididei, V. P. Kravchuk, F. G. Mertens, O. V. Pylypovskyi, A. Saxena, D. D. Sheka, O. M. Volkov
Low Temperature Physics 44, 814 (2018)

255. Frequency linewidth and decay length of spin waves in curved magnetic membranes
J. A. Otalora, A. Kákay, J. Lindner, H. Schultheiss, A. Thomas, J. Fassbender, K. Nielsch
Physical Review B 98, 014403 (2018)

254. Local probe of irradiation induced structural changes and orbital magnetism in Fe60Al40 thin films via order-disorder phase transition
E. La Torre, A. Smekhova, C. Schmitz-Antoniak, K. Ollefs, B. Eggert, B. Cöster, D. Walecki, F. Wilhelm, A. Rogalev, J. Lindner, R. Bali, R. Banerjee, B. Sanyal, H. Wende
Physical Review B 98, 024101 (2018)

253. Investigating spin-transfer torques induced by thermal gradients in magnetic tunnel junctions by using micro-cavity ferromagnetic resonance
H. Cansever, R. Narkowicz, K. Lenz, C. Fowley, L. Ramasubramanian, O. Yildirim, A. Niesen, T. Huebner, G. Reiss, J. Lindner, J. Fassbender, A. M. Deac
Journal of Physics D: Applied Physics 51, 224009 (2018)

252. Unexpected field-induced dynamics in magnetostrictive microstructured elements under isotropic strain
S. Finizio, S. Wintz, S. Gliga, E. Kirk, A. K. Suszka, P. Wohlhüter, K. Zeissler, J. Raabe
Journal of Physics: Condensed Matter 30, 314001 (2018)

251. Origin and Manipulation of Stable Vortex Ground States in Permalloy Nanotubes
M. Zimmermann, T. N. Gerhard-Meier, F. Dirnberger, A. Kákay, M. Decker, S. Wintz, S. Finizio, E. Josten, J. Raabe, M. Kronseder, D. Bougeard, J. Lindner, C. H. Back
Nano Letters 18, 2828 (2018)

250. Laser-Rewriteable Ferromagnetism at Thin Film Surfaces
J. Ehrler, M. He, M. V. Shugaev, N. I. Polushkin, S. Wintz, V. Liersch, S. Cornelius, R. Hübner, K. Potzger, J. Lindner, J. Fassbender, A. A. Ünal, S. Valencia, F. Kronast, L. V. Zhigilei, R. Bali
ACS Applied Materials and Interfaces 10, 15232 (2018)

249. Thick Permalloy films for the imaging of spin texture dynamics in perpendicularly magnetized systems
S. Finizio, S. Wintz, D. Bracher, E. Kirk, A. S. Semisalova, J. Förster, K. Zeissler, T. Weßels, M. Weigand, K. Lenz, A. Kleibert, J. Raabe
Physical Review B 98, 104415 (2018)

248. Multiplet of skyrmion states on a curvilinear defect: Reconfigurable skyrmion lattices
V. P. Kravchuk, D. D. Sheka, A. Kákay, O. M. Volkov, U. K. Rößler, J. van den Brink, D. Makarov, Y. Gaididei
Physical Review Letters 120, 067201 (2018)

247. Symmetries and localization properties of defect modes in metamaterial magnonic superlattices
R. A. Gallardo, T. Schneider, A. Roldán-Molina, M. Langer, A. S. Núñez, K. Lenz, J. Lindner, P. Landeros
Physical Review B 97, 174404 (2018)

246. Magnetosensitive e-skins with directional perception for augmented reality
G. S. Cañón Bermúdez, D. D. Karnaushenko, D. Karnaushenko, A. Lebanov, L. Bischoff, M. Kaltenbrunner, J. Fassbender, O. G. Schmidt, D. Makarov
Science Advances 4, eaao2623 (2018)

245. Mesoscale Dzyaloshinskii-Moriya interaction: geometrical tailoring of the magnetochirality
O. M. Volkov, D. D. Sheka, V. P. Kravchuk, Y. Gaididei, U. K. Rößler, J. Faßbender, D. Makarov
Scientific Reports 8, 866 (2018)

244. Dipolar interaction induced band gaps and flat modes in surface-modulated magnonic crystals
R. A. Gallardo, T. Schneider, A. Roldan-Molina, M. Langer, J. Fassbender, K. Lenz, J. Lindner, P. Landeros
Physical Review B 97, 144405 (2018)

243. Positron Annihilation Studies using a Superconducting Electron LINAC
A. Wagner, M. Butterling, E. Hirschmann, R. Krause-Rehberg, M. O. Liedke, K. Potzger
AIP Conference Proceedings 1970, 040003 (2018)

242. Ultra-dense planar metallic nanowire arrays with extremely large anisotropic optical and magnetic properties
Q. Jia, X. Ou, M. Langer, B. Schreiber, J. Grenzer, P. F. Siles, R. D. Rodriguez, K. Huang, Y. Yuan, A. Heidarian, R. Hübner, T. You, W. Yu, K. Lenz, J. Lindner, X. Wang, S. Facsko
Nano Research 11, 3519 (2018)

241. Interplay between magnetic domain patterning and anisotropic magnetoresistance probed by magnetooptics
J. Osten, K. Lenz, H. Schultheiss, J. Lindner, J. McCord, J. Fassbender
Physical Review B 97, 014415 (2018)



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