Diffusive behavior of a surface layer in BaTiO3 crystals grown by Remeika method. Issue 3 (24th November 2014)

• Record Type: Journal Article
• Authors: Dul'kin, Evgeniy; Roth, Michael
• Is Part Of: European physical journal. Number 68:Issue 3(2014:Dec.)
• Publication Date: 2014-11-24
• Subjects: Physics -- Periodicals; Microscopy -- Periodicals; Microchemistry -- Periodicals; Microstructure -- Periodicals; 530
• DOI: 10.1051/epjap/2014140220
• Languages: English
• ISSNs: 1286-0042

Abstract

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.