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APS » Journals » Phys. Rev. Lett. » Volume 61 » Issue 21
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Phys. Rev. Lett. 61, 2472–2475 (1988)

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

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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

Received 24 August 1988; published in the issue dated 21 November 1988

See accompanying Physics Focus

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.

© 1988 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.61.2472
DOI:
10.1103/PhysRevLett.61.2472
PACS:
75.50.Rr, 72.15.Gd, 75.70.Cn

*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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