Current- and field- induced magnetization dynamics and magnetic configurations in cylindrical nanowires

In the last years the take-off of three-dimensional nanomagnetism has brought into scene diverse novel non-trivial magnetic textures that could be of interest for spintronic and nanoelectronics applications [1,2]. Particularly, cylindrical nanowires are fascinating building blocks of nanoarchitectures due to its surface curvature that promotes domain walls that are likely to reach the high velocities required for fast recording technologies like the Bloch Point (BP) domain wall [3-6], and non-trivial magnetic configurations like Skyrmion tubes [7-9]. The challenge in several technologies based on these objects is to achieve the fast controlled propagation of domain walls and tailoring magnetic domain structure. In this talk I will review recent developments in spin-polarized current- and field- magnetization processes in cylindrical nanowires [4,5], and present three-dimensional magnetic configurations that are appealing for the development of advanced technologies.

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[4] X.-P. Ma et al., Cherenkov-type three-dimensional breakdown behavior of the Bloch-point domain wall motion in the cylindrical nanowire, Appl. Phys. Lett. 117, 062402 (2020).
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[6] J. A. Fernandez-Roldan, C. Bran, R. P. del Real, M. Vazquez and O. Chubykalo-Fesenko. Bloch Point propagation in cylindrical nanowires under spin-polarized currents. (Submitted) (2021)
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[8] J. Garcia et al, Narrow Segment Driven Multistep Magnetization Reversal Process in Sharp Diameter Modulated Fe67Co33 Nanowires, Nanomaterials 2021, 11(11), 3077 (2021).
[9] E. Berganza et al., Evidence of Skyrmion-Tube Mediated Magnetization Reversal in Modulated Nanowires. Materials 14, 5671 (2021).