Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr

We have studied the dependence of impurity vs band effects in the appearance of inverse giant magnetoresistance (IGMR) in Cu/Fe superlattices with Cr. Current in plane (CIP) and current perpendicular to the plane geometries are considered. For the calculation of the conductivities, we have used the...

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Publicado:	2002
Materias:	chromium copper iron article calculation electric resistance geometry magnetism mathematical analysis velocity
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v66_n13_p1344051_Milano http://hdl.handle.net/20.500.12110/paper_01631829_v66_n13_p1344051_Milano
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	paper:paper_01631829_v66_n13_p1344051_Milano2023-06-08T15:13:58Z Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr chromium copper iron article calculation electric resistance geometry magnetism mathematical analysis velocity We have studied the dependence of impurity vs band effects in the appearance of inverse giant magnetoresistance (IGMR) in Cu/Fe superlattices with Cr. Current in plane (CIP) and current perpendicular to the plane geometries are considered. For the calculation of the conductivities, we have used the linearized Boltzmann equation in the relaxation time approximation. Cr impurity effects are taken into account through the spindependent relaxation times and the band effects through the semiclassical velocities obtained from the local-density approximation calculated electronic structure. The larger the Cr/Fe hybridization strength, the bigger is the tendency towards IGMR. In particular, in CIP geometry roughness at these interfaces increases the IGMR range. The calculated giant magnetoresistance ratios have been compared with the experimental results. From this comparison we conclude that the experimental data can only be explained by taking into account Cr bands. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v66_n13_p1344051_Milano http://hdl.handle.net/20.500.12110/paper_01631829_v66_n13_p1344051_Milano
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	chromium copper iron article calculation electric resistance geometry magnetism mathematical analysis velocity
spellingShingle	chromium copper iron article calculation electric resistance geometry magnetism mathematical analysis velocity Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
topic_facet	chromium copper iron article calculation electric resistance geometry magnetism mathematical analysis velocity
description	We have studied the dependence of impurity vs band effects in the appearance of inverse giant magnetoresistance (IGMR) in Cu/Fe superlattices with Cr. Current in plane (CIP) and current perpendicular to the plane geometries are considered. For the calculation of the conductivities, we have used the linearized Boltzmann equation in the relaxation time approximation. Cr impurity effects are taken into account through the spindependent relaxation times and the band effects through the semiclassical velocities obtained from the local-density approximation calculated electronic structure. The larger the Cr/Fe hybridization strength, the bigger is the tendency towards IGMR. In particular, in CIP geometry roughness at these interfaces increases the IGMR range. The calculated giant magnetoresistance ratios have been compared with the experimental results. From this comparison we conclude that the experimental data can only be explained by taking into account Cr bands.
title	Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
title_short	Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
title_full	Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
title_fullStr	Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
title_full_unstemmed	Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr
title_sort	combined impurity and band effects on the appearance of inverse giant magnetoresistance in cu/fe multilayers with cr
publishDate	2002
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v66_n13_p1344051_Milano http://hdl.handle.net/20.500.12110/paper_01631829_v66_n13_p1344051_Milano
_version_	1768546755328081920

Combined impurity and band effects on the appearance of inverse giant magnetoresistance in Cu/Fe multilayers with Cr

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