Title

The Ferroelectric Phase Transition in PbTiO3 from a Local Perspective

Abstract

XAFS of Pb and Ti in PbTiO3 provides quantitative information on the local structure of this ferroelectric perovskite. It was found that both Pb and Ti remain in off center positions above Tc. The local distortions above Tc are about 50-70% of their values at 15 K. The local distortions above Tc are correlated over at least several unit cells. These results suggest that the off center displacements of the Pb and Ti are caused by local interactions and not just by a force field associated with the order parameter.

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

9214526

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1995 Elsevier, All rights reserved.

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