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Spin configurations and negative coercivity in epitaxially grown DyFe2/YFe2 superlattices

Spin configurations and negative coercivity in epitaxially grown DyFe2/YFe2 superlattices
Spin configurations and negative coercivity in epitaxially grown DyFe2/YFe2 superlattices
Molecular beam epitaxial methods have been used to grow single crystal Laves phase DyFe2/YFe2 superlattice samples with a (110) growth direction. In particular, the magnetic properties of the YFe2 dominated multilayer samples [wDyFe2/4wYFe2]×N with w = 20, 30, 40, 45, 50, and 55 Å are presented and discussed. In principle, the multilayer films should possess similar magnetic properties because they are all nominally Dy0.2Y0.8Fe2. However, it is shown that their magnetic properties depend strongly on the thickness of the DyFe2 layers w. Those films with w45 Å possess negative coercivities, while those with w40 Å are positive. It is argued that this behavior can be understood in terms of a strong increase of the intrinsic coercivity of the DyFe2/YFe2 superlattice, taken as a whole, as w is reduced. For w40 Å almost none of the DyFe2 moments can be flipped over in the available field range (12 T).
0021-8979
6828-6830
Gordeev, S.N.
2d51d5e7-5fbd-4753-8eb8-a21ff61deb07
Beaujour, J.M.L.
76365491-7a41-45d2-8cf4-f819474215a8
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Wells, M.R.
eb14a225-4803-4e6c-87b6-c1d1e5b8483d
Gordeev, S.N.
2d51d5e7-5fbd-4753-8eb8-a21ff61deb07
Beaujour, J.M.L.
76365491-7a41-45d2-8cf4-f819474215a8
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Wells, M.R.
eb14a225-4803-4e6c-87b6-c1d1e5b8483d

Gordeev, S.N., Beaujour, J.M.L., Bowden, G.J., de Groot, P.A.J., Rainford, B.D., Ward, R.C.C. and Wells, M.R. (2001) Spin configurations and negative coercivity in epitaxially grown DyFe2/YFe2 superlattices. Journal of Applied Physics, 89 (11), 6828-6830. (doi:10.1063/1.1359465).

Record type: Article

Abstract

Molecular beam epitaxial methods have been used to grow single crystal Laves phase DyFe2/YFe2 superlattice samples with a (110) growth direction. In particular, the magnetic properties of the YFe2 dominated multilayer samples [wDyFe2/4wYFe2]×N with w = 20, 30, 40, 45, 50, and 55 Å are presented and discussed. In principle, the multilayer films should possess similar magnetic properties because they are all nominally Dy0.2Y0.8Fe2. However, it is shown that their magnetic properties depend strongly on the thickness of the DyFe2 layers w. Those films with w45 Å possess negative coercivities, while those with w40 Å are positive. It is argued that this behavior can be understood in terms of a strong increase of the intrinsic coercivity of the DyFe2/YFe2 superlattice, taken as a whole, as w is reduced. For w40 Å almost none of the DyFe2 moments can be flipped over in the available field range (12 T).

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Published date: 1 June 2001

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Local EPrints ID: 57283
URI: http://eprints.soton.ac.uk/id/eprint/57283
ISSN: 0021-8979
PURE UUID: 72dcfe11-6994-4ed7-a4d6-6dfab19d2ec5

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Date deposited: 14 Aug 2008
Last modified: 08 Jan 2022 16:01

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Contributors

Author: S.N. Gordeev
Author: J.M.L. Beaujour
Author: G.J. Bowden
Author: P.A.J. de Groot
Author: B.D. Rainford
Author: R.C.C. Ward
Author: M.R. Wells

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