Universal classes of magnetic-field- and electric-current-induced magnetic domain-wall dynamics in one and two dimensional regimes
- Universal classes of magnetic-field- and electric-current-induced magnetic domain-wall dynamics in one and two dimensional regimes
- 김갑진; Jae-Chul Lee; 신경호; 이현우; 최석봉
- Magnetic domain wall; Dimensional transition; Creep; Universality; Spin transfer torque
- Issue Date
- Current applied physics
- VOL 13, NO 1, 228-236
- Magnetic domain-wall (DW), interface between different magnetic domains, has received great attention
due to its opportunities toward memory and logic devices as well as its abundant physical properties as
a driven interface. Since recent advances of fabrication techniques allow us to scale down the devices, we
are facing lower dimensional properties that should be elucidated undoubtedly. Here, we review recent
progresses on DWdynamics in ferromagnetic nanowires and our recent experimental observation on the
dimensionality transition of the DW dynamics driven by magnetic field and/or current. Our results show
that the DW dynamics shows a transition from two to one dimensional behavior as the wire width
decreases. In addition, we also demonstrate that the magnetic-field- and electric-current-driven DW
dynamics in metallic ferromagnetic nanowires belong to the same universal class.
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