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Title: Experimental evidence of the spin dependence of electron reflections in magnetic CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayers

Abstract

An original epitaxial system consisting of two ferrimagnetic insulator layers (CoFe{sub 2}O{sub 4} and Fe{sub 3}O{sub 4}) separated by a nonmagnetic metallic layer (Au) has been grown. The transport properties in the current in plane geometry indicate that the conduction of the CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayer takes place within the thin metallic layer. The giant magnetoresistance (GMR) observed (2.6% at 10 K) is associated to the switching from a parallel to an antiparallel configuration of the magnetization of the two ferrite layers and corresponds to the spin dependence of electron reflection at the interfaces with a large contribution of specular reflections. The increase of the GMR (5% at 10 K) in the symmetrical interface CoFe{sub 2}O{sub 4}/Fe{sub 3}O{sub 4}/Au/Fe{sub 3}O{sub 4} system and the effect of the interface roughness on the GMR confirm the presence of this spin-dependent specular reflection.

Authors:
; ; ; ; ; ; ;  [1];  [2]
  1. CEMES-CNRS, Boite Postal 4347, 31055 Toulouse (France)
  2. (France)
Publication Date:
OSTI Identifier:
20787995
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 73; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevB.73.104434; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT OXIDES; ELECTRONS; EPITAXY; FERRITES; GEOMETRY; GOLD; INTERFACES; IRON OXIDES; LAYERS; MAGNETIZATION; MAGNETORESISTANCE; REFLECTION; ROUGHNESS; SPIN

Citation Formats

Snoeck, E., Gatel, Ch., Serra, R., BenAssayag, G., Moussy, J.-B., Bataille, A. M., Pannetier, M., Gautier-Soyer, M., and DSM/DRECAM/CAPMAG, CEA Saclay, 91191 Gif-sur-Yvette. Experimental evidence of the spin dependence of electron reflections in magnetic CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayers. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.1.
Snoeck, E., Gatel, Ch., Serra, R., BenAssayag, G., Moussy, J.-B., Bataille, A. M., Pannetier, M., Gautier-Soyer, M., & DSM/DRECAM/CAPMAG, CEA Saclay, 91191 Gif-sur-Yvette. Experimental evidence of the spin dependence of electron reflections in magnetic CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayers. United States. doi:10.1103/PHYSREVB.73.1.
Snoeck, E., Gatel, Ch., Serra, R., BenAssayag, G., Moussy, J.-B., Bataille, A. M., Pannetier, M., Gautier-Soyer, M., and DSM/DRECAM/CAPMAG, CEA Saclay, 91191 Gif-sur-Yvette. Wed . "Experimental evidence of the spin dependence of electron reflections in magnetic CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayers". United States. doi:10.1103/PHYSREVB.73.1.
@article{osti_20787995,
title = {Experimental evidence of the spin dependence of electron reflections in magnetic CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayers},
author = {Snoeck, E. and Gatel, Ch. and Serra, R. and BenAssayag, G. and Moussy, J.-B. and Bataille, A. M. and Pannetier, M. and Gautier-Soyer, M. and DSM/DRECAM/CAPMAG, CEA Saclay, 91191 Gif-sur-Yvette},
abstractNote = {An original epitaxial system consisting of two ferrimagnetic insulator layers (CoFe{sub 2}O{sub 4} and Fe{sub 3}O{sub 4}) separated by a nonmagnetic metallic layer (Au) has been grown. The transport properties in the current in plane geometry indicate that the conduction of the CoFe{sub 2}O{sub 4}/Au/Fe{sub 3}O{sub 4} trilayer takes place within the thin metallic layer. The giant magnetoresistance (GMR) observed (2.6% at 10 K) is associated to the switching from a parallel to an antiparallel configuration of the magnetization of the two ferrite layers and corresponds to the spin dependence of electron reflection at the interfaces with a large contribution of specular reflections. The increase of the GMR (5% at 10 K) in the symmetrical interface CoFe{sub 2}O{sub 4}/Fe{sub 3}O{sub 4}/Au/Fe{sub 3}O{sub 4} system and the effect of the interface roughness on the GMR confirm the presence of this spin-dependent specular reflection.},
doi = {10.1103/PHYSREVB.73.1},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 10,
volume = 73,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}