Evidence of local anisotropic strains in relaxor ferroelectrics below intermediate temperature T* detected by acoustic emission

E. Dul'Kin*, B. Mihailova, M. Gospodinov, E. Mojaev, M. Roth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Oriented {100}-, {110}-, and {111}-cuts of Pb0.78Ba 0.22Sc0.5Ta0.5O3 single crystals have been studied by means of the acoustic emission (AE) method during their thermal cycling in the temperature range of 300-600K. For all crystal orientations pronounced AE signals have been detected near 490K, which corresponds to the intermediate temperature T*. However, the highest AE count rate has been detected from {110}-oriented cuts, revealing strong anisotropic coupling between the existing polar species that at T * merge into larger regions of polarization (PNRs). The temperature's hysteresis is revealed to be 15K, indicating that the transformation processes at T* can be considered as local Martensitic-like ferroelectric transitions inside PNRs. The interplay between PNRs and ultrahigh local strains of perovskite-type relaxor ferroelectrics is discussed.

Original languageAmerican English
Article number222201
JournalJournal of Physics Condensed Matter
Volume22
Issue number22
DOIs
StatePublished - 2010

Fingerprint

Dive into the research topics of 'Evidence of local anisotropic strains in relaxor ferroelectrics below intermediate temperature T* detected by acoustic emission'. Together they form a unique fingerprint.

Cite this