Magnetic vortex polarity reversal induced gyrotropic motion spectrum splitting in a ferromagnetic disk

Xiaomin Cui; Shaojie Hu; Yohei Hidaka; Satoshi Yakata; Takashi Kimura

Magnetic vortex polarity reversal induced gyrotropic motion spectrum splitting in a ferromagnetic disk

Applied Physics 2024-03-12 v1

Authors: Xiaomin Cui , Shaojie Hu , Yohei Hidaka , Satoshi Yakata , Takashi Kimura

Abstract

We investigate the gyrotropic motion of the magnetic vortex core in a chain of a few micron-sized Permalloy disks by electrical resistance measurement with amplitude-modulated magnetic field. We observe a distinctive splitting of the resistance peak due to the resonant vortex-core motion under heightened radio frequency (RF) magnetic field excitation. Our micromagnetic simulation identifies the splitting of the resonant peak as an outcome of vortex polarity reversal under substantial RF amplitudes. This study enhances our understanding of nonlinear magnetic vortex dynamics amidst large RF amplitudes and proposes a potential pathway for spintronic neural computing thanks to their unique and controllable magnetization dynamics.

Keywords

magnetic vortex gyrotropic motion vortex polarity reversal Permalloy disk micromagnetic simulation spintronic neural computing

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@article{arxiv.2403.06491,
  title  = {Magnetic vortex polarity reversal induced gyrotropic motion spectrum splitting in a ferromagnetic disk},
  author = {Xiaomin Cui and Shaojie Hu and Yohei Hidaka and Satoshi Yakata and Takashi Kimura},
  journal= {arXiv preprint arXiv:2403.06491},
  year   = {2024}
}

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14 pages, 5 figures

Magnetic vortex polarity reversal induced gyrotropic motion spectrum splitting in a ferromagnetic disk

Abstract

Keywords

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