Contact

Porträt Dr. Wintz, Sebastian; FWIN

Dr. Sebastian Wintz
Magnetism
s.wintz@hzdr.de
Tel.: +49 351 260 - 2919
Fax: +49 351 260 - 3285

Dynamics of spin textures

 

Cover
From: FWI Annual Report 2011
Illustration: Katrin Kerbusch

 

Abstract

Nanoscale spin textures are the building blocks for present magnetic data storage devices, in particular hard disk drives. However, future memory applications need to match the demand for an increasing data density, read/write performance, and energy efficiency. For the technological development, it is crucial to gain knowledge on the physics governing the magnetization dynamics of nanoscale spin textures. We investigate this kind of dynamics by direct imaging with x-ray microscopy; a technique that achieves a combined resolution of approximately 10 nanometers and 50 picoseconds in space and time, respectively.

 

Collaborations:

Jörg Raabe (PSI Villigen, Switzerland)

Hermann Stoll (MPI-IS Stuttgart | Bessy HZB Berlin)

Guido Meier (Universität Hamburg)

Mi-Young Im, Peter Fischer (LBNL Berkeley, USA)

Vasyl Tyberkevych, Andrei Slavin (Oakland University, USA)

Jeffrey McCord (Universität Kiel)

Roland Mattheis (IPHT Jena)

 

Research Topics

  • Spinvortices in ferromagnetic multilayers
  • Interaction between magnetic vortices and antivortices
  • Spinvortex dynamics in the presence of artificial defects
  • Current induced domain wall motion in magnetic nanowires

  


 

Publications

2014

(15) R. Bali, S. Wintz, F. Meutzner, R. Huebner, R. Boucher, A. K. Ünal, S. Valencia, A. Neudert, K. Potzger, J. Bauch, F. Kronast, S. Facsko, J. Lindner, J. Fassbender 
“Exploiting Disorder Induced Ferromagnetism for Printing Discrete Magnetic Patterns in Thin Films”
Nano Lett. 14, 435 (2014).

(14) M. Krause, M. Buljan, A. Mücklich, W. Möller, M. Fritzsche, S. Facsko, R. Heller, M. Zschornack, S. Wintz, J. L. Endrino, C. Baehtz, A. Shalimov, S. Gemming, G. Abrasonis
“Ion induced compositionally modulated ripples during composite film growth: three-dimensional pattern formation at the nanoscale”
Phys. Rev. B 89, 085418 (2014).

2013

(13) M. Buhl, A. Erbe, J. Grebing, S. Wintz, J. Raabe, J. Fassbender
"Lateral spin transfer torque induced magnetic switching at room temperature demonstrated by x-ray microscopy"
Sci. Rep. 3, 2945 (2013).

(12) S. Wintz, C. Bunce, A. Neudert, M. Körner, T. Strache, M. Buhl, A. Erbe, S. Gemming, J. Raabe, C. Quitmann, J. Fassbender
"Topology and origin of effective spin meron pairs in ferromagnetic multilayer elements"
Phys. Rev. Lett. 110, 177201 (2013). 

(11) J. Kimling, T. Gerhardt, A. Kobs, A. Vogel, S. Wintz, M.-Y. Im, P. Fischer, H. P. Oepen, U. Merkt, G. Meier 
"Tuning of the nucleation field in nanowires with perpendicular magnetic anisotropy"
J. Appl. Phys. 113, 163902 (2013).

2012

(10) S. Wintz, C. Bunce, A. Banholzer, M. Körner, T. Strache, R. Mattheis, J. Raabe, C. Quitmann, J. Mccord, A. Erbe, J. Fassbender
"Interlayer coupled spin vortex pairs and their response to external magnetic fields"
Phys. Rev. B 85, 224420 (2012).

(9) S. Wintz, T. Strache, M. Körner, C. Bunce, A. Banholzer, I. Mönch, R. Mattheis, J. Raabe, C. Quitmann, J. Mccord, A. Erbe, K. Lenz, J. Fassbender
"Control of vortex pair states by post-deposition interlayer exchange coupling modification"
Phys. Rev. B 85, 134417 (2012).

(8) M. Krause, A. Mücklich, T. W. H. Oates, M. Zschornak, S. Wintz, J. L. Endrino, C. Baehtz, A. Shalimov, S. Gemming, G. Abrasonis 
“Tilting of carbon encapsulated nickel nanocolumns by ion beam assisted deposition“ 
Appl. Phys. Lett. 101, 053112 (2012).

(7) G. Abrasonis, S. Wintz, M. O. Liedke, F. Aksoy, M. Krause, D. Banerjee, Z. Liu, S. Gemming 
“Environment Controlled De-wetting of Rh-Pd Bilayers: a Route for Core-Shell Nanostructure Synthesis“ 
J. Phys. Chem. C 116, 14401 (2012).

2011

(6) S. Wintz, T. Strache, M. Körner, M. Fritzsche, D. Marko, I. Mönch, R. Mattheis, J. Raabe, C. Quitmann, J. McCord, A. Erbe, J. Fassbender
"Direct observation of antiferromagnetically oriented spin vortex states in magnetic multilayer elements"
Appl. Phys. Lett. 98, 232511 (2011) and Appl. Phys. Lett. [erratum] 99, 149901 (2011).

(5) A. Vogel, S. Wintz, T. Gerhardt, L. Bocklage, T. Strache, M.Y. Im, P. Fischer, J. Fassbender, J. McCord, G. Meier
"Field- and current-induced domain-wall motion in permalloy nanowires with magnetic soft spots"
Appl. Phys. Lett. 98, 202501 (2011) and Virt. J. Nanoscale Sci. and Technol., May 2011.

2010

(4) A. Vogel, S. Wintz, J. Moser, M. Bolte, T. Strache, M. Fritzsche, M.Y. Im, P. Fischer, G. Meier, J. Fassbender
"Domain-wall pinning and depinning at soft sports in magnetic nanowires"
IEEE Trans. Magn. 46, 1708 (2010).

(3) C. Quitmann, J. Raabe, A. Puzic, K. Kuepper, S. Wintz
"Dynamics of Mesoscopic Magnetic Objects"
pp. 385-405 in E. Beaurepaire et al. (eds.), Magnetism and Synchrotron Radiation: New Trends, Springer Proceedings in Physics 133, Springer-Verlag Berlin Heidelberg (2010).

A. Puzic, T. Korhonen, B. Kalantari, J. Raabe, C. Quitmann, P. Jüllig, L. Bommer, D. Goll, G. Schütz, S. Wintz, T. Strache, M. Körner, D. Marko, C. Bunce, J. Fassbender
"Photon Counting System for Time-resolved Experiments in Multibunch Mode"
Synchrotron Radiation News 23, 26 (2010) [non-ISI].

2009

(2) K. Kuepper, S. Wintz, J. Raabe, M. Buess, Ch. Akhmadaliev, L. Bischoff, C. Quitmann, J. Fassbender
"Magnetization dynamics of Landau structures: tuning the response of mesoscopic objects using defects"
J. Phys.: Cond. Mater 21, 436003 (2009).

(1) J. Fassbender, T. Strache, M. O. Liedke, D. Marko, S. Wintz, K. Lenz, A. Keller, S. Facsko, I. Mönch, and J. Mccord
"Introducing artificial length scales to tailor magnetic properties"
New J. Phys. 11, 125002 (2009).


Before 2009

K. Küpper, M. Buess, J. Raabe, C. Quitmann, J. Fassbender
"Dynamic vortex-antivortex interaction in a single cross-tie wall"
Phys. Rev. Lett. 99, 167202 (2007) and Virt. J. Nanoscale Sci. and Technol., October 2007.

K. Küpper. L. Bischoff, Ch. Akhmadaliev, J. Fassbender, H. Stoll, K. W. Chou, A. Puzic, K. Fauth, D. Dolgos, G. Schütz, B. van Waeyenberge, T. Tyliszczak, I. Neudecker, G. Woltersdorf, C. H. Back
"Vortex dynamics in permalloy disks with artificially defects: suppression of the gyrotropic mode" 
Appl. Phys. Lett. 90, 062506 (2007).

J. Fassbender, L. Bischoff, R. Mattheis, P. Fischer
"Magnetic domains and magnetization reversal of ion-induced magnetically patterned RKKY-coupled Ni81Fe19/Ru/Co90Fe10 films"
J. Appl. Phys. 99, 08G301 (2006).

 


 

News

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FZD research award 2007 for Dr. Karsten Küpper