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Combinatorial discovery of a lead-free morphotropic phase boundary in a thin-film piezoelectric perovskite

Appl. Phys. Lett. 92, 202904 (2008); doi:10.1063/1.2931706

Published 21 May 2008

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S. Fujino,1 M. Murakami,1 V. Anbusathaiah,2 S.-H. Lim,1 V. Nagarajan,2 C. J. Fennie,3 M. Wuttig,1 L. Salamanca-Riba,1 and I. Takeuchi1
1Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
2School of Materials Science, University of New South Wales, Sydney New South Wales 2052, Australia
3Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
We report on the discovery of a lead-free morphotropic phase boundary (MPB) in Sm doped BiFeO3 with a simple perovskite structure using the combinatorial thin film strategy. The boundary is a rhombohedral to pseudo-orthorhombic structural transition which exhibits a ferroelectric to antiferroelectric transition at approximately Bi0.86Sm0.14FeO3 with dielectric constant and out-of-plane piezoelectric coefficient comparable to those of epitaxial (001) oriented PbZr0.52Ti0.48O3 (PZT) thin films at the MPB. The discovered composition may be a strong candidate of a Pb-free piezoelectric replacement of PZT. ©2008 American Institute of Physics
History: Received 9 April 2008; accepted 19 April 2008; published 21 May 2008
Permalink: http://link.aip.org/link/?APPLAB/92/202904/1
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KEYWORDS and PACS

Keywords
PACS
  • 77.84.Bw
    Dielectric, piezoelectric, and ferroelectric elements, oxides, nitrides, borides, carbides, chalcogenides, etc
  • 77.55.+f
    Dielectric thin films
  • 77.80.Bh
    Ferroelectric phase transitions and Curie point
  • 77.22.Ch
    Permittivity (dielectric function)
  • 77.65.Bn
    Piezoelectric and electrostrictive constants
  • 81.30.Hd
    Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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