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Spin-flop transition driven by exchange springs in ErFe2/YFe2 multilayers

Spin-flop transition driven by exchange springs in ErFe2/YFe2 multilayers
Spin-flop transition driven by exchange springs in ErFe2/YFe2 multilayers
Magnetization loops for (110) ErFe2/YFe2 multilayer films grown by molecular beam epitaxy (MBE) are presented and discussed. The easy axis for the hard ErFe2 layers is near an out of plane <111> type crystal axis. At low temperatures there is just one irreversible switch of the hard layers, accompanied by the formation of magnetic exchange springs in the soft YFe2 layers. However, above a certain temperature the coercivity changes sign and there are additional high field transitions. This cross-over temperature, TCO, depends upon the composition of the multilayers. In sufficiently high fields, perpendicular to the multilayer film plane, the energy is minimized by an exchange spring driven multilayer spin-flop state. The composition dependence of TCO is explained with a simple energy argument.
rare earth, multilayer, exchange springs
0021-8979
09K511-[3pp]
Martin, K.N.
c53d0004-4655-40e9-aa05-563f3a9602c4
Wang, K.
2b399d1b-c3f1-4863-b78b-dd9135ef7532
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zimmermann, J.P.
b4047fb7-cba4-4777-9847-18061e78706e
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Martin, K.N.
c53d0004-4655-40e9-aa05-563f3a9602c4
Wang, K.
2b399d1b-c3f1-4863-b78b-dd9135ef7532
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zimmermann, J.P.
b4047fb7-cba4-4777-9847-18061e78706e
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb

Martin, K.N., Wang, K., Bowden, G.J., de Groot, P.A.J., Zimmermann, J.P., Fangohr, Hans and Ward, R.C.C. (2007) Spin-flop transition driven by exchange springs in ErFe2/YFe2 multilayers. Journal of Applied Physics, 101 (9), 09K511-[3pp]. (doi:10.1063/1.2672248).

Record type: Article

Abstract

Magnetization loops for (110) ErFe2/YFe2 multilayer films grown by molecular beam epitaxy (MBE) are presented and discussed. The easy axis for the hard ErFe2 layers is near an out of plane <111> type crystal axis. At low temperatures there is just one irreversible switch of the hard layers, accompanied by the formation of magnetic exchange springs in the soft YFe2 layers. However, above a certain temperature the coercivity changes sign and there are additional high field transitions. This cross-over temperature, TCO, depends upon the composition of the multilayers. In sufficiently high fields, perpendicular to the multilayer film plane, the energy is minimized by an exchange spring driven multilayer spin-flop state. The composition dependence of TCO is explained with a simple energy argument.

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Published date: 19 April 2007
Additional Information: Copyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.The following article appeared in J. Appl. Phys. 101, 09K511 (2007) and may be found at http://link.aip.org/link/?JAPIAU/101/09K511/1
Keywords: rare earth, multilayer, exchange springs

Identifiers

Local EPrints ID: 51005
URI: http://eprints.soton.ac.uk/id/eprint/51005
ISSN: 0021-8979
PURE UUID: 6804f476-795c-4765-b1ec-c71df64b1a1a
ORCID for Hans Fangohr: ORCID iD orcid.org/0000-0001-5494-7193

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Date deposited: 28 Apr 2008
Last modified: 17 Dec 2019 01:53

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Contributors

Author: K.N. Martin
Author: K. Wang
Author: G.J. Bowden
Author: P.A.J. de Groot
Author: J.P. Zimmermann
Author: Hans Fangohr ORCID iD
Author: R.C.C. Ward

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