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High-Field Giant Magnetoresistance in Co-Cu Superlattices

Published online by Cambridge University Press:  03 September 2012

Darryl Barlett ,
Frank Tsui ,
Lincoln Lauhon ,
Tushar Mandrekar ,
Ohrad Uher  and
Roy Clarke
Darryl Barlett
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
Frank Tsui
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
Lincoln Lauhon
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
Tushar Mandrekar
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
Ohrad Uher
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
Roy Clarke
Affiliation:
University of Michigan, Harrison Randall Laboratory of Physics, Ann Arbor, MI 48109.
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Abstract

We present evidence for a new type of giant magnetoresistance in (111) cobalt-copper superlattices with atomically smooth interfaces. We propose that the lowered dimensionality of the structure leads to an enhancement of the scattering of conduction electrons from paramagnetic interfaces obeying a Langevin-like saturation at very high fields, well beyond the switching field of the Co layers. The findings help to explain similarities in magnetotransport behavior with recently reported granular systems as well as differences with antiferromagnetically coupled Multilayers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 35
Copyright
Copyright © Materials Research Society 1993

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References

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