Micromagnetic Simulation of Magnetic Particles with Surface Anisotropy

Lin Yuan; Jianjun Jiang; Gang Du; Zhongyou Wang; Huahui He

doi:10.3379/msjmag.32.50

Contributed Paper

Micromagnetic Simulation of Magnetic Particles with Surface Anisotropy

Lin Yuan, Jianjun Jiang, Gang Du, Zhongyou Wang, Huahui He

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Keywords: micromagnetic, magnetic particle, surface anisotropy, resonance frequency

JOURNAL OPEN ACCESS

2008 Volume 32 Issue 2_1 Pages 50-53

DOI https://doi.org/10.3379/msjmag.32.50

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Abstract

The resonance frequency of ferromagnetic particles with surface anisotropy was investigated by micromagnetic simulation. Two kinds of calculations were done: those with Aharoni surface anisotropy and those with Néel-Brown surface anisotropy. In Aharoni surface anisotropy, the relationship between the resonance frequency and particle size D was in agreement with Shilov's theory. In Néel-Brown surface anisotropy, the resonance frequency was proportional to 1/b, where b was the length of the short axis.

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