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Structural Studies of Pulsed-laser-deposited Ba4Fe4Ti3O16 Oxide Films

Published online by Cambridge University Press:  31 January 2011

L. A. Bendersky ,
R. Maier ,
J. L. Cohn  and
J. J. Neumeier
L. A. Bendersky
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
R. Maier
Affiliation:
Department of Physics, University of Miami, Coral Gables, Florida 33124
J. L. Cohn
Affiliation:
Department of Physics, University of Miami, Coral Gables, Florida 33124
J. J. Neumeier
Affiliation:
Department of Physics, Florida Atlantic University, Boca Raton, Florida 33431
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Abstract

For this paper the pulsed laser deposition on single-crystal MgO substrates of Ba4Fe4Ti3O16 target was studied by transmission electron microscopy and x-ray diffraction. The initial stage of the deposition resulted in the formation of the perovskite Ba(Fe, Ti)O3 phase in an epitaxial, cube-on-cube orientation relationship with a substrate. Further growth of the pseudo-cubic phase was interrupted by the formation of oriented grains with a disordered structure. This disordered structure had a mixture of lamellae of the cubic and hexagonal Ba(Fe, Ti)O3 phases. No formation of the Ba4Fe4Ti3O16 (E) phase was observed. Formation of the disordered phase was explained by the higher stability of hexagonal Ba(Fe, Ti)O3 where accommodation of Fe3+ occurred on a twinning plane. The development of the V-shape morphology and a limited number of orientations of the D structure were explained by the faceting and columnar morphology of the perovskite phase.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 6 , June 2000 , pp. 1389 - 1396
Copyright
Copyright © Materials Research Society 2000

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