2024
DOI: 10.1088/1361-6463/ad5c75
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Magnetic vortex polarity reversal induced gyrotropic motion spectrum splitting in a ferromagnetic disk

Xiaomin Cui,
Shaojie Hu,
Yohei Hidaka
et al.

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 … Show more

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