Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions

Simon John Greaves; Hiroaki Muraoka; Yasushi Kanai

doi:10.1063/1.4908025

Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions

Simon John Greaves, Hiroaki Muraoka, Yasushi Kanai

Broadband Engineering Division

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

8 Citations (Scopus)

Abstract

Brillouin functions were used to model the temperature dependence of magnetisation in media for heat assisted magnetic recording. Although dH_k/dT was higher when Brillouin functions with J=0.5 or J=1 were used, an earlier onset of the linear reversal mode led to a drop in dH_c/dT near to T_c, resulting in wider written bits. Tracks written with a higher thermal gradient were also wider when J was small and had lower SNR.

Original language	English
Article number	17C505
Journal	Journal of Applied Physics
Volume	117
Issue number	17
DOIs	https://doi.org/10.1063/1.4908025
Publication status	Published - 2015 May 7

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4908025

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abstract = "Brillouin functions were used to model the temperature dependence of magnetisation in media for heat assisted magnetic recording. Although dHk/dT was higher when Brillouin functions with J=0.5 or J=1 were used, an earlier onset of the linear reversal mode led to a drop in dHc/dT near to Tc, resulting in wider written bits. Tracks written with a higher thermal gradient were also wider when J was small and had lower SNR.",

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Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions

Abstract

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