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Journal of the Magnetics Society of Japan
Vol. 32 (2008) No. 2_1 P 50-53



Contributed Paper

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.

Copyright © 2008 The Magnetics Society of Japan

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