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

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

Research output: Contribution to journalArticlepeer-review

9 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 languageEnglish (US)
Article number6332971
Pages (from-to)3188-3191
Number of pages4
JournalIEEE Transactions on Magnetics
Volume48
Issue number11
DOIs
StatePublished - Oct 29 2012

Keywords

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

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