Giant magnetoresistance by exchange springs in DyFe2/YFe2 superlattices

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.

Local EPrints ID: 14728

URI: http://eprints.soton.ac.uk/id/eprint/14728

DOI: doi:10.1103/PhysRevLett.87.186808

ISSN: 0031-9007

PURE UUID: 1dde53e5-af3f-4c95-80bb-7b869a57e3fc

Date deposited: 25 Feb 2005

Last modified: 15 Mar 2024 05:30