TITLE

Carbon: A bane for giant magnetoresistance magnetic multilayers

AUTHOR(S)
Yang, David X.; Chopra, Harsh Deep; Shashishekar, B.; Chen, P. J.; Egelhoff, W. F.
PUB. DATE
April 2002
SOURCE
Applied Physics Letters;4/22/2002, Vol. 80 Issue 16, p2943
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This study reports the highly deleterious role of a small amount of carbon on the structure and magnetic properties of “giant” magnetoresistance (GMR) NiO–Co–Cu-based spin valves. Controlled incorporation of 1–3 at. % carbon in the Co/Cu layers has been shown to completely eliminate the GMR effect. The presence of carbon gives rise to highly discontinuous Co/Cu layers, resulting in the formation of pinholes, and associated degradation of structure-sensitive magnetic properties. In addition, carbon promotes the formation of a high density of stacking faults in the Co/Cu layers, with carbon nanoprecipitates forming in the vicinity of the stacking faults. Results have implications for other multilayers and magnetoelectronics devices. © 2002 American Institute of Physics.
ACCESSION #
6494765

 

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