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Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices

Phys. Rev. Lett. 61, 2472 – Published 21 November 1988
M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas

Abstract

We have studied the magnetoresistance of (001)Fe/(001)Cr superlattices prepared by molecularbeam epitaxy. A huge magnetoresistance is found in superlattices with thin Cr layers: For example, with tCr=9 Å, at T=4.2 K, the resistivity is lowered by almost a factor of 2 in a magnetic field of 2 T. We ascribe this giant magnetoresistance to spin-dependent transmission of the conduction electrons between Fe layers through Cr layers.

DOI: http://dx.doi.org/10.1103/PhysRevLett.61.2472

  • Received 24 August 1988
  • Published in the issue dated 21 November 1988

© 1988 The American Physical Society

Physics Focus

Nobel Focus: Sensitive Magnetic Sandwich

Published 15 October 2007

Authors & Affiliations

M. N. Baibich*, J. M. Broto, A. Fert, F. Nguyen Van Dau, and F. Petroff

  • Laboratoire de Physique des Solides, Université Paris-Sud, F-91405 Orsay, France

P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas

  • Laboratoire Central de Recherches, Thomson CSF, B.P. 10, F-91401 Orsay, France

  • *Permanent address: Instituto de Fisica, Universidade Federal do Rio Grande do Sul, C.P. 15051, 91500 Porto Alegre, Rio Grande do Sul, Brazil.

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