Exchange coupled composite media for heat assisted magnetic recording

Exchange coupled composite media for heat assisted magnetic recording

Micromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchang...

Full description

Bibliographic Details
Main Authors: Zengyuan Liu, R. H. Victora
Format: Article
Language:English
Published: AIP Publishing LLC 2017-05-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.4978461
id doaj-ad123d6a12cb48049792aa238cbf6d82
record_format Article
spelling doaj-ad123d6a12cb48049792aa238cbf6d822020-11-25T00:57:52ZengAIP Publishing LLCAIP Advances2158-32262017-05-0175056516056516-610.1063/1.4978461345791ADVExchange coupled composite media for heat assisted magnetic recordingZengyuan Liu0R. H. Victora1Center for Micromagnetics and Information Technologies, Minneapolis, Minnesota 55455, USACenter for Micromagnetics and Information Technologies, Minneapolis, Minnesota 55455, USAMicromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers Jex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(Jex)−0.5 and writing temperature Tsw∝(Jex)−1. It is also found that the writing layer leads the storage layer during switching.http://dx.doi.org/10.1063/1.4978461
collection DOAJ
language English
format Article
sources DOAJ
author Zengyuan Liu
R. H. Victora
spellingShingle Zengyuan Liu
R. H. Victora
Exchange coupled composite media for heat assisted magnetic recording
AIP Advances
author_facet Zengyuan Liu
R. H. Victora
author_sort Zengyuan Liu
title Exchange coupled composite media for heat assisted magnetic recording
title_short Exchange coupled composite media for heat assisted magnetic recording
title_full Exchange coupled composite media for heat assisted magnetic recording
title_fullStr Exchange coupled composite media for heat assisted magnetic recording
title_full_unstemmed Exchange coupled composite media for heat assisted magnetic recording
title_sort exchange coupled composite media for heat assisted magnetic recording
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2017-05-01
description Micromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers Jex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(Jex)−0.5 and writing temperature Tsw∝(Jex)−1. It is also found that the writing layer leads the storage layer during switching.
url http://dx.doi.org/10.1063/1.4978461
work_keys_str_mv AT zengyuanliu exchangecoupledcompositemediaforheatassistedmagneticrecording
AT rhvictora exchangecoupledcompositemediaforheatassistedmagneticrecording
_version_ 1725222541058899968

Similar Items