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Conversion Electron Mossbauer Spectroscopy of Epitaxial Iron Oxide Films

Published online by Cambridge University Press:  15 February 2011

M. Takano ,
T. Fujii ,
Y. Bando ,
Y. Isozumi ,
R. Katano  and
T. Okuda
M. Takano
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
T. Fujii
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
Y. Bando
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
Y. Isozumi
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
R. Katano
Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan
T. Okuda
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki-ken 305, Japan
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Abstract

Epitaxially grown iron oxide films have been studied microscopically by conversion electron M~ssbauer spectroscopy. Specially designed proportional counters cover a temperature range between 1.75K and 1100K. A 5Å-thick layer containing 57Fe was grown at an arbitrary depth of a 56 Fe3O4 film, even- at the topmost or at the interface with a substrate crystal, to find local properties nondestructively. Temperature dependence of the hyperfine parameters of Bi 3 Fe5O12 films were analyzed to find structural and magnetic effects of Bi3+ in comparison with usual garnets. The Morin transition of α-Fe2O3 was found to strongly depend upon the orientation of films and post-annealing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 232: Symposium T – Magnetic Materials: Microstructure and Properties , 1991 , 319
Copyright
Copyright © Materials Research Society 1991

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References

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