Nonlinear Giant Magnetoresistance in Dual Spin Valves

Aziz, A. and Wessely, O. P. and Ali, M. and Edwards, D. M. and Marrows, C. H. and Hickey, B. J. and Blamire, M. G. (2009) Nonlinear Giant Magnetoresistance in Dual Spin Valves. Physical review letters, 103 (23). ISSN 0031-9007

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Abstract

Giant magnetoresistance (GMR) arises from differential scattering of the majority and minority spin electrons by a ferromagnet (FM) so that the resistance of a heterostructure depends on the relative magnetic orientation of the FM layers within it separated by nonmagnetic spacers. Here, we show that highly nonequilibrium spin accumulation in metallic heterostructures results in a current-dependent nonlinear GMR which is not predicted within the present understanding of GMR. The behavior can be explained by allowing the scattering asymmetries in an ultrathin FM layer to be current dependent.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2009 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
63532
Deposited By:
Deposited On:
19 Apr 2013 10:21
Refereed?:
Yes
Published?:
Published
Last Modified:
31 Mar 2020 02:38