Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide

R. F L Evans; Q. Coopman; S. Devos; W. J. Fan; O. Hovorka; R. W. Chantrell

doi:10.1088/0022-3727/47/50/502001

Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide

R. F L Evans, Q. Coopman, S. Devos, W. J. Fan, O. Hovorka, R. W. Chantrell

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

Abstract

The exchange coupling of two magnetic layers via a diffuse oxide interlayer is studied with an atomistic spin model. We investigate the effect of magnetic concentration and oxide layer thickness on the effective exchange coupling strength and find an exponential dependence of the coupling strength on the oxide thickness without the need for magnetic pinholes. Furthermore we show that exchange coupling has a strong temperature dependence which is significant for the reversal dynamics during heat assisted magnetic recording.

Original language	English
Article number	502001
Number of pages	5
Journal	Journal of Physics D: Applied Physics
Volume	47
Issue number	50
Early online date	24 Nov 2014
DOIs	https://doi.org/10.1088/0022-3727/47/50/502001
Publication status	Published - 17 Dec 2014

Keywords

Atomistic spin model
Exchange coupling
HAMR
Intergranular exchange
Magnetic recording

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10.1088/0022-3727/47/50/502001

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abstract = "The exchange coupling of two magnetic layers via a diffuse oxide interlayer is studied with an atomistic spin model. We investigate the effect of magnetic concentration and oxide layer thickness on the effective exchange coupling strength and find an exponential dependence of the coupling strength on the oxide thickness without the need for magnetic pinholes. Furthermore we show that exchange coupling has a strong temperature dependence which is significant for the reversal dynamics during heat assisted magnetic recording.",

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AU - Coopman, Q.

AU - Devos, S.

AU - Fan, W. J.

AU - Hovorka, O.

AU - Chantrell, R. W.

PY - 2014/12/17

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AB - The exchange coupling of two magnetic layers via a diffuse oxide interlayer is studied with an atomistic spin model. We investigate the effect of magnetic concentration and oxide layer thickness on the effective exchange coupling strength and find an exponential dependence of the coupling strength on the oxide thickness without the need for magnetic pinholes. Furthermore we show that exchange coupling has a strong temperature dependence which is significant for the reversal dynamics during heat assisted magnetic recording.

KW - Atomistic spin model

KW - Exchange coupling

KW - HAMR

KW - Intergranular exchange

KW - Magnetic recording

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Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide

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Keywords

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