Inverse giant magnetoresistance (invited)

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.361350· OSTI ID:280044

Renard, J; Bruno, P; Megy, R; Bartenlian, B; Beauvillain, P; Chappert, C; Dupas, C; Kolb, E; Mulloy, M; Prieur, J; Veillet, P; Velu, E ^[1]

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1. Institut dElectronique Fondamentale, CNRS URA 022, Batiment 220, Universite Paris-Sud, 91405 Orsay Cedex (France)

Inverse giant magnetoresistance (GMR) is obtained in multilayers alternating two ferromagnetic layers {ital F}{sub 1} and {ital F}{sub 2} with different asymmetry of spin scattering, {alpha}{sub 1}{approx_gt}1 and {alpha}{sub 2}{lt}1. This is clearly demonstrated in the simple spin-valve system with perpendicular magnetization Fe{sub 1{minus}{ital x}}V{sub {ital x}}/Au/Co. With respect to Fe, the FeV alloys with {ital x}=0.18 and 0.29 exhibit an inversion of the spin scattering coefficients ({alpha}{sub Fe}{approx_gt}1, {alpha}{sub FeV}{lt}1) due to the change of the densities of states at the Fermi level. The inverse MR of FeV/Au/Co is studied as a function of FeV layer thickness and temperature and compared to calculations based on the Camley{endash}Barnas model. The data show that the inverse GMR is due to the bulk scattering within the FeV layer, which coexists with a substantial interface scattering favoring normal GMR. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 280044
• Report Number(s): CONF-951101--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 79; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
ELECTRONIC STRUCTURE
GOLD
IRON BASE ALLOYS
MAGNETIC MATERIALS
MAGNETORESISTANCE
MULTILAYERS
TEMPERATURE DEPENDENCE
THICKNESS
VANADIUM ALLOYS