Composite Media for Heat Assisted Magnetic Recording

Simon John Greaves, Yoshiaki Sonobe, Hiroaki Muraoka

Research output: Contribution to journalArticlepeer-review

Abstract

Composite media grains consisting of two discrete magnetic layers with different uniaxial anisotropies, Ku, and Curie temperatures, Tc , were investigated for heat assisted magnetic recording. The maximum switching probability of optimized composite grains exceeded that of single phase grains. As Ku of one layer increased the optimum Ku of the other layer became smaller, tending toward zero in many cases. Leading and trailing edge recording were also compared. Trailing edge recording was superior when the maximum temperature in the grain, Tmax , was similar to Tc , but when Tmax exceeded Tc leading edge recording performed better.

Original languageEnglish
Article number7907259
JournalIEEE Transactions on Magnetics
Volume53
Issue number11
DOIs
Publication statusPublished - 2017 Nov 1

Keywords

  • Composite media
  • heat assisted magnetic recording (HAMR)
  • simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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