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A vapor-deposition technique was used to prepare Pd-Fe fine particles. Since palladium is fairly inert, it is our hope to develop magnetic particles which are stable in air. An as-cast alloy of bulk P...
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Theory of magnetic superlattices: Interlayer exchange coupling and magnetoresistance of transition metal structures (invited)
Theoretical calculations and models to explain two unusual features of Fe/Cr magnetically layered structures are presented: (1) Strong antiferromagnetic (AF) couplings between Fe layers separated by C...

Magnetic and transport properties of Fe/Cr superlattices (invited)

J. Appl. Phys. 67, 5908 (1990); doi:10.1063/1.346013

Issue Date: 1 May 1990

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A. Barthélémy, A. Fert, M. N. Baibich, S. Hadjoudj, and F. Petroff
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France

P. Etienne, R. Cabanel, S. Lequien, F. Nguyen Van Dau, and G. Creuzet
LCR Thomson CSF, 91404 Orsay, France
We describe the magnetic and transport properties of Fe(001)/Cr(001) superlattices grown on GaAs (001) by molecular-beam epitaxy and characterized by reflection high-energy electron diffraction (RHEED), Auger spectroscopy, x-ray diffraction, and electron microscopy. For Cr layers thinner than about 30 Å the magnetic behavior reveals strong antiferromagnetic couplings between the Fe layers across the Cr layers. Polarized neutron diffraction experiments confirm the existence of an antiferromagnetic superstructure. We discuss the origin of the antiferromagnetic (AF) coupling. The Fe/Cr superlattices with AF interlayer coupling exhibit a giant magnetoresistance: when an applied field aligns the magnetizations of the Fe layers, the resistivity drops by a factor of 2 for some samples. This giant magnetoresistance can be ascribed to the spin dependence of the electron scattering by interfaces. We compare our results with the predictions of two recent theoretical models. Journal of Applied Physics is copyrighted by The American Institute of Physics.
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KEYWORDS and PACS

Keywords
PACS
  • 75.50.Rr
    Magnetic properties and materials Studies of specific magnetic materials Magnetism in interface structures (including layer and superlattice structures)
  • 72.15.Gd
    Electronic transport in condensed matter Electronic conduction in metals and alloys Galvanomagnetic and other magnetotransport effects
  • 75.70.Cn
    Magnetic properties and materials Magnetic films and multilayers Interfacial magnetic properties
  • YEAR: 1990

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
AIP is a member of CrossRef AIP

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