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Transmission Electron Microscopy Study of CoPt(001) and FePt(001) Films Formed from Epitaxial Co/Pt and Fe/Pt Multilayers

Published online by Cambridge University Press:  21 February 2011

MR.M. Visokay
Affiliation:
Department of Materials Science and Engineering Stanford University, Stanford CA 94305
BM.B. Lairson
Affiliation:
Department of Materials Science and Engineering Stanford University, Stanford CA 94305
B.B. Clemens
Affiliation:
Department of Materials Science and Engineering Stanford University, Stanford CA 94305
R. Sinclair
Affiliation:
Department of Materials Science and Engineering Stanford University, Stanford CA 94305
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Abstract

Transmission electron microscopy was performed on epitaxial Fe/Pt and Co/Pt [001] oriented multilayers that were sputter deposited onto single crystal [001] MgO. Films were examined as-deposited and after annealing in vacuum. Before annealing, the films had a magnetic easy axis in the plane while after annealing the easy axis was out of the plane. Perpendicular anisotropies of 8× 106 erg/cm3 and 1.9x 107 erg/cm3 were measured for the Fe/Pt and Co/Pt post-annealed films. Large magneto-optic Kerr rotations were also measured, 0.6° and 0.4° for the Fe/Pt and Co/Pt annealed films, respectively. Changes in the magnetic properties were a direct result of the transformation of the multilayer into c axis oriented FePt and CoPt intermetallic compounds upon annealing.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

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References

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Transmission Electron Microscopy Study of CoPt(001) and FePt(001) Films Formed from Epitaxial Co/Pt and Fe/Pt Multilayers
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Transmission Electron Microscopy Study of CoPt(001) and FePt(001) Films Formed from Epitaxial Co/Pt and Fe/Pt Multilayers
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