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Giant Magnetoresistance and Structure of Phase-Segregated Epitaxial Metals*

Published online by Cambridge University Press:  03 September 2012

R.F. Marks ,
R.F.C. Farrow ,
G.R. Harp ,
S.S.P. Parkin ,
T.A. Rabedeau ,
M.F. Toney ,
A. Cebollada ,
N. Thangaraj  and
Kannan M. Krishnan
R.F. Marks
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
R.F.C. Farrow
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
G.R. Harp
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
S.S.P. Parkin
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
T.A. Rabedeau
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
M.F. Toney
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
A. Cebollada
Affiliation:
IBM Research Division, Almadén Research Center, 650 Harry Road, San Jose, CA 95120–6099
N. Thangaraj
Affiliation:
National Center for Electron Microscopy, Lawrence Berkeley Laboratory, Cyclotron Road, Berkeley, CA 94720
Kannan M. Krishnan
Affiliation:
National Center for Electron Microscopy, Lawrence Berkeley Laboratory, Cyclotron Road, Berkeley, CA 94720
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Abstract

Giant Magnetoresistance, GMR, in thin metal films elicits attention due to its technological potential as well as its relevance to theory of exchange coupling. Epitaxial, phase-segregated ferromagnet/paramagnet Mixtures have been grown by UHV evaporation. Such films show spontaneous formation of ferromagnetic clusters, leading to large values of GMR (40% at room temperature) as grown. The growth of Co-Cu, Co-Ag, Fe-Ag and Permalloy-Ag films are described. Structural analysis by grazing-incidence small angle X-ray scattering (GISAXS) provides a measure of cluster size and characteristic spacing. Effects of growth temperature and subsequent annealing on GMR and film structure are described. Preliminary results of TEM examination of (001) Fe-Ag and Co-Ag granular films are presented for the first time.

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 , 411
Copyright
Copyright © Materials Research Society 1993

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Footnotes

*

This work was supported in part by ONR.

References

REFERENCES

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