Ferroelectric precursor behavior of highly cation-ordered PbSc0.5Ta0.5O3 detected by acoustic emission: Tweed and polar nanoregions

Dul'kin, Evgeniy and Salje, Ekhard K. H. and Aktas, Oktay and Whatmore, Roger W. and Roth, Michael (2014) Ferroelectric precursor behavior of highly cation-ordered PbSc0.5Ta0.5O3 detected by acoustic emission: Tweed and polar nanoregions. Applied Physics Letters, 105 (21). p. 212901. ISSN 0003-6951, ESSN: 1077-3118 DOI 10.1063/1.4902511

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Abstract

Highly ordered ferroelectric PbSc0.5 Ta 0.5O3 crystals were studied by acoustic emission over a wide temperature range. Acoustic emission was found at three characteristic temperatures: 330, 409, and ≈600 K, which are close to those, known from the same disordered crystals, containing polar nanoregions. The microstructure in our crystals contains structural “tweed” rather than nanoregions. The coincidence of acoustic emission temperatures points towards a close structural relationship between nanoregions and “tweed.” Under electric field, these temperatures shift similar to “critical end point” behavior. The obtained data prove that acoustic emission detects signals in a wider parameter space than previously expected.

Item Type: Article
Uncontrolled Keywords: 2014AREP; IA68;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Applied Physics Letters
Volume: 105
Page Range: p. 212901
Identification Number: 10.1063/1.4902511
Depositing User: Sarah Humbert
Date Deposited: 23 Jan 2015 16:27
Last Modified: 27 Jan 2015 18:34
URI: http://eprints.esc.cam.ac.uk/id/eprint/3216

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