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Diffusive behavior of a surface layer in BaTiO3 crystals grown by Remeika method

Published online by Cambridge University Press:  25 November 2014

Evgeniy Dul’kin  and
Michael Roth
Evgeniy Dul’kin*
Affiliation:
Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Michael Roth
Affiliation:
Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
*
a[email protected]
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Abstract

BaTiO3 crystals, grown by Remeika method, were studied by means of acoustic emission and dielectric response. It is established, that the phase transition in the surface layer occurs on 13 °C below in comparing with the crystals bulk. It is observed, that the imaginary dielectric response of a crystal surface layer exhibits an essential smearing and slight frequency shift to higher temperatures. Reasons of such properties are discussed from a viewpoint of diffusive phase transition, taking place in the surface layer, enriched by K+ ions from KF flux.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 68 , Issue 3 , December 2014 , 31301
Copyright
© EDP Sciences, 2014

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