Effect of thermal fluctuation on reversal field of magnetic fine particle with surface anisotropy

Y. Nakatani; N. Hayashi; Y. Uesaka; H. Fukushima; O. Kitakami; Y. Shimada

doi:10.1109/20.908739

Effect of thermal fluctuation on reversal field of magnetic fine particle with surface anisotropy

Y. Nakatani, N. Hayashi, Y. Uesaka, H. Fukushima, O. Kitakami, Y. Shimada

Division of Inorganic Material Research

Research output: Contribution to journal › Conference article

3 Citations (Scopus)

Abstract

The magnetization reversal of a nanometer size ferromagnetic particle with surface anisotropy is investigated by micromagnetic computer simulation. Two kinds of calculations were performed: calculations with and without thermal fluctuation. In the case without thermal fluctuation a surface anisotropy of several ergs/cm² was found to increase the magnetization reversal field of the particle by a factor of ten as compared with the case without surface anisotropy. The introduction of surface anisotropy was also found to increase the reversal field, and hence, improve thermal stability.

Original language	English
Pages (from-to)	3205-3207
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	36
Issue number	5 I
DOIs	https://doi.org/10.1109/20.908739
Publication status	Published - 2000 Sep 1
Event	2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada Duration: 2000 Apr 9 → 2000 Apr 12

Keywords

Computer simulation
Fine particle
Micromagnetics
Surface anisotropy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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abstract = "The magnetization reversal of a nanometer size ferromagnetic particle with surface anisotropy is investigated by micromagnetic computer simulation. Two kinds of calculations were performed: calculations with and without thermal fluctuation. In the case without thermal fluctuation a surface anisotropy of several ergs/cm2 was found to increase the magnetization reversal field of the particle by a factor of ten as compared with the case without surface anisotropy. The introduction of surface anisotropy was also found to increase the reversal field, and hence, improve thermal stability.",

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T1 - Effect of thermal fluctuation on reversal field of magnetic fine particle with surface anisotropy

AU - Nakatani, Y.

AU - Hayashi, N.

AU - Uesaka, Y.

AU - Fukushima, H.

AU - Kitakami, O.

AU - Shimada, Y.

PY - 2000/9/1

Y1 - 2000/9/1

N2 - The magnetization reversal of a nanometer size ferromagnetic particle with surface anisotropy is investigated by micromagnetic computer simulation. Two kinds of calculations were performed: calculations with and without thermal fluctuation. In the case without thermal fluctuation a surface anisotropy of several ergs/cm2 was found to increase the magnetization reversal field of the particle by a factor of ten as compared with the case without surface anisotropy. The introduction of surface anisotropy was also found to increase the reversal field, and hence, improve thermal stability.

AB - The magnetization reversal of a nanometer size ferromagnetic particle with surface anisotropy is investigated by micromagnetic computer simulation. Two kinds of calculations were performed: calculations with and without thermal fluctuation. In the case without thermal fluctuation a surface anisotropy of several ergs/cm2 was found to increase the magnetization reversal field of the particle by a factor of ten as compared with the case without surface anisotropy. The introduction of surface anisotropy was also found to increase the reversal field, and hence, improve thermal stability.

KW - Computer simulation

KW - Fine particle

KW - Micromagnetics

KW - Surface anisotropy

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

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