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

Physical Review Letters · 1988 · Vol. 61(21) · pp. 2472–2475

M. N. Baibich✉(Université Paris-Sud)J.M. Broto(Laboratoire de physique des Solides)A. Fert(Université Paris-Sud)F. Nguyen Van Dau(Laboratoire de physique des Solides)F. Pétroff(Laboratoire de physique des Solides)P. Étienne(Université Paris-Sud)G. Creuzet(Université Paris-Sud)A. Friederich(Laboratoire de physique des Solides)J. Chazelas(Université Paris-Sud)

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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 ${t}_{\mathrm{Cr}}=9$ \AA{}, 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.

Magnetic properties of thin films Quantum and electron transport phenomena Surface and Thin Film PhenomenaMagnetoresistanceSuperlatticeCondensed matter physicsGiant magnetoresistanceMaterials scienceElectrical resistivity and conductivityEpitaxyElectronColossal magnetoresistanceMagnetic field

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Spin Hall Effects in Metals