Acoustic emission pronounced field-induced response near critical point in Ba0.6Sr0.4TiO3 ferroelectrics

Evgeniy Dul'kin*, Jiwei Zhai, Michael Roth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Ba0.60Sr0.40TiO3 ceramic ferroelectric (FE) has been investigated in the wide temperature range under a dc external electric field (E) by means of dedicated acoustic emission (AE) method. The Curie point Tc=9°C, as well as both the temperature points, characteristic of relaxor ferroelectrics (RFEs), Burns temperature T d=283°C and intermediate temperature T*=182°C have successfully been detected. Tc demonstrates a nontrivial behavior in dependence on E, i.e., initially it decreases, reaches a minimum of T th=1.2°C at the small threshold field Eth=0. 75kVcm-1, and then starts to increase similar to ordered FEs, as E increases. The AE count rate, accompanying this nontrivial behavior of T c(E) dependence, exhibits a pronounced maximum ≈5.4s-1 above Eth at the Em=1.5kVcm-1. Both, T d and T* demonstrate a dependence on E, too, as was recently observed in relaxor FEs PbSc0.5Nb0.5O3 [Dul'kin et al., J. Appl. Phys. 113, 054105 (2013)]. The AE pronounced maximum is explained to be a consequence of the giant piezoelectric coefficients intrinsic to BaxSr1-xTiO3 FEs.

Original languageAmerican English
Pages (from-to)1539-1544
Number of pages6
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume211
Issue number7
DOIs
StatePublished - Jul 2014

Keywords

  • acoustic emission
  • critical point
  • piezoelectric coefficient
  • relaxor ferroelectrics

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