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Nanoanalytical Characterization of Granular Ag-Fe Films with Giant Magnetoresistance

Published online by Cambridge University Press:  21 February 2011

J. Liu ,
Z. G. Li ,
H. Wan ,
A. Tsoukatos  and
G. C. Hadjipanayis
J. Liu
Affiliation:
Center for Solid State Science, Arizona State University, Tempe, AZ 85287
Z. G. Li
Affiliation:
Du Pont Company., P. 0. Box 80356, Wilmington, DE 19880
H. Wan
Affiliation:
Department of Physics and Astronomy, University of Delaware, Newark, DE 19716
A. Tsoukatos
Affiliation:
Department of Physics and Astronomy, University of Delaware, Newark, DE 19716
G. C. Hadjipanayis
Affiliation:
Department of Physics and Astronomy, University of Delaware, Newark, DE 19716
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Abstract

Dedicated scanning transmission electron microscopy and associated techniques were used to extract microstructural and compositional information about granular Ag-Fe magnetic films produced by sputtering. Nanometer-resolution compositional analysis by energy dispersive X-ray spectroscopy (EDS), showed that Ag-Fe granular films consist of two separate phases. It has been found that nanometer size Fe particles are separated by small as well as large Ag particles. Nanodiffraction patterns showed that a large proportion of small Ag particles have an icosahedral shape and that the Fe particles are highly disordered. The nanostructure of the Ag-Fe system and its relation to the giant magnetoresistance of granular films are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 332: Symposium U – Determining Nanoscale Physical Properties of Materials by Microscopy and Spectroscopy , 1994 , 303
Copyright
Copyright © Materials Research Society 1994

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References

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