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Giant magnetoresistance by exchange springs in DyFe2/YFe2 superlattices

Giant magnetoresistance by exchange springs in DyFe2/YFe2 superlattices
Giant magnetoresistance by exchange springs in DyFe2/YFe2 superlattices
Magnetization and magnetoresistance measurements are reported for antiferromagnetically coupled DyFe2/YFe2 multilayers in fields up to 23 T. It is demonstrated that the formation of short exchange springs ( ~20 Å) in the magnetically soft YFe2 layers results in a giant magnetoresistance as high as 32% in the spring region. It is shown that both the magnitude of the effect and its dependence on magnetic field are in good agreement with the theory of Levy and Zhang for domain wall induced giant magnetoresistance.
0031-9007
186808-[4pp]
Gordeev, S.N.
2d51d5e7-5fbd-4753-8eb8-a21ff61deb07
Beaujour, J.-M.L.
4ce7f656-cb17-4d5f-b8fd-ff31fa32e55d
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Wells, M.R.
eb14a225-4803-4e6c-87b6-c1d1e5b8483d
Jansen, A.G.M.
2012ee27-aa29-40c1-a2a5-198653cbe99e
Gordeev, S.N.
2d51d5e7-5fbd-4753-8eb8-a21ff61deb07
Beaujour, J.-M.L.
4ce7f656-cb17-4d5f-b8fd-ff31fa32e55d
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Wells, M.R.
eb14a225-4803-4e6c-87b6-c1d1e5b8483d
Jansen, A.G.M.
2012ee27-aa29-40c1-a2a5-198653cbe99e

Gordeev, S.N., Beaujour, J.-M.L., Bowden, G.J., Rainford, B.D., de Groot, P.A.J., Ward, R.C.C., Wells, M.R. and Jansen, A.G.M. (2001) Giant magnetoresistance by exchange springs in DyFe2/YFe2 superlattices. Physical Review Letters, 87 (18), 186808-[4pp]. (doi:10.1103/PhysRevLett.87.186808).

Record type: Article

Abstract

Magnetization and magnetoresistance measurements are reported for antiferromagnetically coupled DyFe2/YFe2 multilayers in fields up to 23 T. It is demonstrated that the formation of short exchange springs ( ~20 Å) in the magnetically soft YFe2 layers results in a giant magnetoresistance as high as 32% in the spring region. It is shown that both the magnitude of the effect and its dependence on magnetic field are in good agreement with the theory of Levy and Zhang for domain wall induced giant magnetoresistance.

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Published date: 2001
Additional Information: S. N. Gordeev*, J.-M. L. Beaujour, G. J. Bowden, B. D. Rainford, and P. A. J. de Groot§ Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom R. C. C. Ward and M. R. Wells Clarendon Laboratory, Oxford University, Oxford OX1 3PU, United Kingdom A. G. M. Jansen Grenoble High Magnetic Field Laboratory, Max-Planck-Institute für Festkörperforschung and Centre National de la Recherche Scientifique, BP 166, F-38042 Grenoble Cedex 9, France Received 20 October 2000; published 16 October 2001 Magnetization and magnetoresistance measurements are reported for antiferromagnetically coupled DyFe2/YFe2 multilayers in fields up to 23 T. It is demonstrated that the formation of short exchange springs ( ~20 Å) in the magnetically soft YFe2 layers results in a giant magnetoresistance as high as 32% in the spring region. It is shown that both the magnitude of the effect and its dependence on magnetic field are in good agreement with the theory of Levy and Zhang for domain wall induced giant magnetoresistance.

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Local EPrints ID: 14728
URI: http://eprints.soton.ac.uk/id/eprint/14728
ISSN: 0031-9007
PURE UUID: 1dde53e5-af3f-4c95-80bb-7b869a57e3fc

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Date deposited: 25 Feb 2005
Last modified: 11 Apr 2022 17:59

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Contributors

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

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