Acoustic emission pronounced field‐induced response near critical point in Ba0.6Sr0.4TiO3 ferroelectrics. Issue 7 (26th March 2014)

• Record Type: Journal Article
• Authors: Dul'kin, Evgeniy; Zhai, Jiwei; Roth, Michael
• Is Part Of: Physica status solidi. Volume 211:Issue 7(2014:Jul.)
• Page Start: 1539
• Page End: 1544
• Publication Date: 2014-03-26
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201431023
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201431023-sec-0001" sec-type="section"> <p>Ba<sub>0.60</sub>Sr<sub>0.40</sub>TiO<sub>3</sub> ceramic ferroelectric (FE) has been investigated in the wide temperature range under a dc external electric field (<italic>E</italic>) by means of dedicated acoustic emission (AE) method. The Curie point <italic>T</italic><sub>c</sub> = 9 °C, as well as both the temperature points, characteristic of relaxor ferroelectrics (RFEs), Burns temperature <italic>T</italic><sub>d</sub> = 283 °C and intermediate temperature <italic>T</italic>* = 182 °C have successfully been detected. <italic>T</italic><sub>c</sub> demonstrates a nontrivial behavior in dependence on <italic>E</italic>, i.e., initially it decreases, reaches a minimum of <italic>T</italic><sub>th</sub> = 1.2 °C at the small threshold field <italic>E</italic><sub>th</sub> = 0.75 kV cm<sup>−1</sup>, and then starts to increase similar to ordered FEs, as <italic>E</italic> increases. The AE count rate, accompanying this nontrivial behavior of <italic>T</italic><sub>c</sub>(<italic>E</italic>) dependence, exhibits a pronounced maximum ≈5.4 s<sup>−1</sup> above <italic>E</italic><sub>th</sub> at the <italic>E</italic><sub>m</sub> = 1.5 kV cm<sup>−1</sup>. Both, <italic>T</italic><sub>d</sub> and <italic>T</italic>* demonstrate a dependence on <italic>E</italic>, too, as was recently observed in relaxor FEs PbSc<sub>0.5</sub>Nb<sub>0.5</sub>O<sub>3</sub> [Dul'kin et al., J. Appl. Phys. <bold>113</bold>, 054105 (2013)]. The AE pronounced maximum is explained to be a consequence of the giant piezoelectric coefficients intrinsic to Ba<sub><italic>x</italic></sub>Sr<sub>1−<italic>x</italic></sub>TiO<sub>3</sub> FEs.</p> </sec> </abstract>