High speed magnetisation reversal in heat-assisted magnetic recording

Simon John Greaves, Hiroaki Muraoka, Yasushi Kanai

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Calculations of switching times as a function of temperature and damping constant are discussed. Near to the Curie temperature, the switching time can be much shorter than at room temperature and independent of K u. Simulations of heat-assisted magnetic recording were used to study the effect of heat and magnetic field pulse durations on the size and sharpness of bits written on various media. In media with small damping constants, the transition width was hardly influenced by the heat pulse duration, whereas, in media with higher damping constants, the transition width increased with the heat pulse duration.

Original languageEnglish
Article number07B706
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
Publication statusPublished - 2012 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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