Numerical study of spin relaxation by thermal fluctuation: Effect of shape anisotropy

K. J. Lee; N. Y. Park; T. D. Lee

doi:10.1063/1.1355348

Numerical study of spin relaxation by thermal fluctuation: Effect of shape anisotropy

K. J. Lee, N. Y. Park, T. D. Lee

Research output: Contribution to journal › Conference article › peer-review

6 Citations (Scopus)

Abstract

Effects of the shape anisotropy on the thermally activated spin relaxation have been investigated using the stochastic Landau-Lifshitz-Gilbert equation. The relaxation times of a noninteracting particle and a thin film were compared with each other. In a noninteracting particle, the relaxation time largely increased with the shape anisotropy when the damping constant was smaller than a certain critical value. In this study, the critical damping constant was 0.02. However, the effect of the shape anisotropy on the energy barrier was negligible in a thin film. All of these results can be explained from the effect of magnetostatic interaction that is enhanced by precession motion at low damping constant.

Original language	English
Pages (from-to)	7460-7462
Number of pages	3
Journal	Journal of Applied Physics
Volume	89
Issue number	11 II
DOIs	https://doi.org/10.1063/1.1355348
Publication status	Published - 2001 Jun 1
Externally published	Yes
Event	8th Joint Magnetism and Magnetic Materials-Intermag Conference - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.1355348

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title = "Numerical study of spin relaxation by thermal fluctuation: Effect of shape anisotropy",

abstract = "Effects of the shape anisotropy on the thermally activated spin relaxation have been investigated using the stochastic Landau-Lifshitz-Gilbert equation. The relaxation times of a noninteracting particle and a thin film were compared with each other. In a noninteracting particle, the relaxation time largely increased with the shape anisotropy when the damping constant was smaller than a certain critical value. In this study, the critical damping constant was 0.02. However, the effect of the shape anisotropy on the energy barrier was negligible in a thin film. All of these results can be explained from the effect of magnetostatic interaction that is enhanced by precession motion at low damping constant.",

author = "Lee, {K. J.} and Park, {N. Y.} and Lee, {T. D.}",

note = "Copyright: Copyright 2005 Elsevier Science B.V., Amsterdam. All rights reserved.; 8th Joint Magnetism and Magnetic Materials-Intermag Conference ; Conference date: 07-01-2001 Through 11-01-2001",

year = "2001",

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doi = "10.1063/1.1355348",

language = "English",

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T1 - Numerical study of spin relaxation by thermal fluctuation

T2 - 8th Joint Magnetism and Magnetic Materials-Intermag Conference

AU - Lee, K. J.

AU - Park, N. Y.

AU - Lee, T. D.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - Effects of the shape anisotropy on the thermally activated spin relaxation have been investigated using the stochastic Landau-Lifshitz-Gilbert equation. The relaxation times of a noninteracting particle and a thin film were compared with each other. In a noninteracting particle, the relaxation time largely increased with the shape anisotropy when the damping constant was smaller than a certain critical value. In this study, the critical damping constant was 0.02. However, the effect of the shape anisotropy on the energy barrier was negligible in a thin film. All of these results can be explained from the effect of magnetostatic interaction that is enhanced by precession motion at low damping constant.

AB - Effects of the shape anisotropy on the thermally activated spin relaxation have been investigated using the stochastic Landau-Lifshitz-Gilbert equation. The relaxation times of a noninteracting particle and a thin film were compared with each other. In a noninteracting particle, the relaxation time largely increased with the shape anisotropy when the damping constant was smaller than a certain critical value. In this study, the critical damping constant was 0.02. However, the effect of the shape anisotropy on the energy barrier was negligible in a thin film. All of these results can be explained from the effect of magnetostatic interaction that is enhanced by precession motion at low damping constant.

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EP - 7462

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 11 II

Y2 - 7 January 2001 through 11 January 2001

ER -

Numerical study of spin relaxation by thermal fluctuation: Effect of shape anisotropy

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