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

4 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)

Access to Document

10.1063/1.4908025

Fingerprint Dive into the research topics of 'Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions'. Together they form a unique fingerprint.

Cite this

@article{f1eaaf36ed9a4575b48b2c3e2cab2481,

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

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.",

author = "Greaves, {Simon John} and Hiroaki Muraoka and Yasushi Kanai",

year = "2015",

month = may,

day = "7",

doi = "10.1063/1.4908025",

language = "English",

volume = "117",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "17",

}

TY - JOUR

T1 - Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions

AU - Greaves, Simon John

AU - Muraoka, Hiroaki

AU - Kanai, Yasushi

PY - 2015/5/7

Y1 - 2015/5/7

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84923684092&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923684092&partnerID=8YFLogxK

U2 - 10.1063/1.4908025

DO - 10.1063/1.4908025

M3 - Article

AN - SCOPUS:84923684092

VL - 117

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 17

M1 - 17C505

ER -