Diffusive behavior of a surface layer in BaTiO3 crystals grown by Remeika method
Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem
Revised: 20 September 2014
Accepted: 15 October 2014
Published online: 25 November 2014
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.
© EDP Sciences, 2014