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Layered microdomains and columnar grains in epitaxial La0.7Ca0.3MnO3 films and Y0.7Ca0.3MnO3/La0.7Ca0.3MnO3 multilayers

Published online by Cambridge University Press:  31 January 2011

C. J. Lu ,
Z. L. Wang ,
G. C. Xiong  and
G. J. Lian
C. J. Lu
Affiliation:
Beijing Laboratory of Electron Microscopy, Center of Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, People's Republic of China
Z. L. Wang
Affiliation:
Beijing Laboratory of Electron Microscopy, Center of Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, People's Republic of China
G. C. Xiong
Affiliation:
National Mesocopic Physics State Key Laboratory and Department of Physics, Peking University, 100871 Beijing, People's Republic of China
G. J. Lian
Affiliation:
National Mesocopic Physics State Key Laboratory and Department of Physics, Peking University, 100871 Beijing, People's Republic of China
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Abstract

Epitaxial La0.7Ca0.3MnO3 thin film and [Y0.7Ca0.3MnO3/La0.7Ca0.3MnO3]10 multilayers of about 140 nm in thickness were grown by pulsed laser deposition on (001)LaAlO3. Their microstructures were investigated by transmission electron microscopy and associated techniques. It was found that both the film and the multilayers contain an almost defect-free layer near the substrate, followed by columnar grain grown. The columns were separated by strained regions in the top layer. No interfacial dislocations were observed at either of the La0.7Ca0.3MnO3/LaAlO3 or the Y0.7Ca0.3MnO3/La0.7Ca0.3MnO3 interfaces. Interestingly, both the epitaxial film and the multilayers exhibited layered crystallographic domains. The formation mechanisms of the layered domain structures observed are discussed.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 11 , November 2000 , pp. 2454 - 2462
Copyright
Copyright © Materials Research Society 2000

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References

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