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Microstructure and conversion electron Mössbauer studies of M decrease in Fe3O4 films

Published online by Cambridge University Press:  31 January 2011

C. Ortiz,
C. Hwang,
A. H. Morrish and
X. Z. Zhou
C. Ortiz
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099
C. Hwang
Affiliation:
IBM General Products Division, 5600 Cottle Road, San Jose, California 95193
A. H. Morrish
Affiliation:
Department of Physics, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
X. Z. Zhou
Affiliation:
Department of Physics, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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Abstract

This paper analyzes the influence of the deposition conditions (substrate temperature and oxygen flow) on the magnetic moment of Fe3O4 films grown by reactive RF sputtering. With conversion electron Mössbauer spectroscopy and transmission electron microscopy of specific microstructures we have identified different mechanisms which can contribute to the decrease of M in our samples: decrease of average grain size (superparamagnetism) and distortion of the lattice which may induce mispopulation of tetrahedral and octahedral sites and decrease of crystalline quality.

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Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 4 , April 1990, pp. 824 - 828
Copyright
Copyright © Materials Research Society 1990

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References

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