Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide
Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide
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.
exchange coupling, magnetic recording, HAMR, atomistic spin model, intergranular exchange
1-6
Evans, R.F.L.
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Coopman, Q.
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Devos, S.
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Fan, W.J.
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Hovorka, O.
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Chantrell, R.W.
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24 November 2014
Evans, R.F.L.
c52105b3-abfa-40d2-bf1d-750b66c2c54b
Coopman, Q.
4c5d7571-9ef6-4364-90f9-04928bc0b252
Devos, S.
39c93199-cf9c-4f9c-a61a-44b86e92491c
Fan, W.J.
2e37b50a-3267-4a61-b532-329c315beec9
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee
Chantrell, R.W.
2df0bd37-172a-4d0b-892a-2c78b6dc3fc3
Evans, R.F.L., Coopman, Q., Devos, S., Fan, W.J., Hovorka, O. and Chantrell, R.W.
(2014)
Atomistic calculation of the thickness and temperature dependence of exchange coupling through a dilute magnetic oxide.
Journal of Physics D: Applied Physics, 47 (50), .
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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Accepted/In Press date: 30 October 2014
Published date: 24 November 2014
Keywords:
exchange coupling, magnetic recording, HAMR, atomistic spin model, intergranular exchange
Organisations:
Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 381835
URI: http://eprints.soton.ac.uk/id/eprint/381835
ISSN: 0022-3727
PURE UUID: b603cbad-428e-4443-990a-6203e0067c17
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Date deposited: 30 Sep 2015 16:00
Last modified: 09 Jan 2022 03:44
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Contributors
Author:
R.F.L. Evans
Author:
Q. Coopman
Author:
S. Devos
Author:
W.J. Fan
Author:
R.W. Chantrell
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