Statistical approach based on the Stoner-Wohlfarth model for the switching field in a misoriented magnet array

Donghyeon Lee, Jungmin Park, Donghyeon Han, Suzuki Ippei, Takahashi Yukiko, Sujung Noh, Jisung Lee, Joonhyun Kwon, Hansaem Lee, Sanghoon Kim

研究成果: Article査読

抄録

The Stoner-Wohlfarth model (SW model) is used to explain the relationship between the external magnetic field and the magnetization reversal of a single magnetic domain. However, it is inappropriate for inhomogeneous magnetic films or bulk materials, such as granular and defective films, because the magnetization reversal of the films is affected by magnetic particles or grains, which could have a different anisotropy for uniaxial magnetic anisotropy (UMA) of the films. In this paper, we propose a model based on the SW model to understand the magnetization switching behavior of magnetic films with misoriented grains. Our model considers the distribution effect of different anisotropies originating from magnetic defects or domains against the UMA of a magnetic thin film, and a Gaussian function is employed for the probability distribution of tilted anisotropy. Finally, we experimentally demonstrate that our model describes the magnetic switching behavior of a granular magnetic film (FePt-C) with perpendicular magnetic anisotropy. This study provides an alternative analytical method for the magnetization reversal in magnetic devices.

本文言語English
論文番号024027
ジャーナルPhysical Review Applied
21
2
DOI
出版ステータスPublished - 2024 2月

ASJC Scopus subject areas

  • 物理学および天文学一般

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