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Antiphase Domain Boundaries in Thin Films of Magnetite

Published online by Cambridge University Press:  31 January 2003

M.L. Rudee
Affiliation:
Department of Electrical and Computer Engineering and the Center for Magnetic Recording Research, University of California, San Diego, CA 92093-0401
D.T. Margulies
Affiliation:
Graduate Program in Materials Science and the Center for Magnetic Recording Research, University of California, San Diego, CA 92093-0401
A.E. Berkowitz
Affiliation:
Department of Physics and the Center for Magnetic Recording Research, University of California, San Diego, CA 92093-0401
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Abstract

Abstract: Films of Fe3O4 were prepared by sputter deposition onto MgO substrates of both 〈100〉 and 〈110〉 orientations. The films used in this study were mainly 50 nm thick. X-ray diffraction, Mössbauer spectroscopy, and other techniques revealed that the films were stoichiometric single crystals. Electron microscopy showed that the films were essentially dislocation free. Despite this high degree of perfection, the magnetic properties of the films were inconsistent with bulk single crystal properties. For example, the magnetization of the films did not saturate in fields as large as 7 Tesla, while bulk single crystals saturate by 0.1 Tesla.

Type
Research Article
Copyright
2001 Cambridge University Press

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