Time dependence of magnetic anisotropy at finite temperature for homogeneous and composite media

Pin Wei Huang; Xi Chen; R. H. Victora

doi:10.1109/TMAG.2012.2196991

Time dependence of magnetic anisotropy at finite temperature for homogeneous and composite media

Pin Wei Huang, Xi Chen, R. H. Victora

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A simple torque-based method for calculating the transient behavior of temperature-dependent magnetic anisotropy is introduced. Using this method we obtain several physical quantities at finite temperature, including effective anisotropy, anisotropy field, and their fluctuations, that are crucial to heat-assisted magnetic recording (HAMR). We show that use of a composite grain that includes a high Curie temperature soft layer reduces the anisotropy fluctuations.

Original language	English (US)
Article number	6332971
Pages (from-to)	3188-3191
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	48
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2012.2196991
State	Published - Oct 29 2012

Keywords

Anisotropy
Composite media
Heat-assisted magnetic recording
Landau-Liftshitz-Gilbert

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abstract = "A simple torque-based method for calculating the transient behavior of temperature-dependent magnetic anisotropy is introduced. Using this method we obtain several physical quantities at finite temperature, including effective anisotropy, anisotropy field, and their fluctuations, that are crucial to heat-assisted magnetic recording (HAMR). We show that use of a composite grain that includes a high Curie temperature soft layer reduces the anisotropy fluctuations.",

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AU - Chen, Xi

AU - Victora, R. H.

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KW - Anisotropy

KW - Composite media

KW - Heat-assisted magnetic recording

KW - Landau-Liftshitz-Gilbert

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Time dependence of magnetic anisotropy at finite temperature for homogeneous and composite media

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