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

Evgeniy Dul'Kin; Ekhard K.H. Salje; Oktay Aktas; Roger W. Whatmore; Michael Roth

doi:10.1063/1.4902511

Ferroelectric precursor behavior of highly cation-ordered PbSc_0.5Ta_0.5O₃ detected by acoustic emission: Tweed and polar nanoregions

Evgeniy Dul'Kin, Ekhard K.H. Salje, Oktay Aktas, Roger W. Whatmore, Michael Roth

Department of Applied Physics

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Highly ordered ferroelectric PbSc_0.5Ta_0.5O₃ crystals were studied by acoustic emission over a wide temperature range. Acoustic emission was found at three characteristic temperatures: 330, 409, and 600K, 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.

Original language	English
Article number	212901
Journal	Applied Physics Letters
Volume	105
Issue number	21
DOIs	https://doi.org/10.1063/1.4902511
State	Published - 24 Nov 2014

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

abstract = "Highly ordered ferroelectric PbSc0.5Ta0.5O3 crystals were studied by acoustic emission over a wide temperature range. Acoustic emission was found at three characteristic temperatures: 330, 409, and 600K, 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.",

author = "Evgeniy Dul'Kin and Salje, {Ekhard K.H.} and Oktay Aktas and Whatmore, {Roger W.} and Michael Roth",

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T1 - Ferroelectric precursor behavior of highly cation-ordered PbSc0.5Ta0.5O3 detected by acoustic emission

T2 - Tweed and polar nanoregions

AU - Dul'Kin, Evgeniy

AU - Salje, Ekhard K.H.

AU - Aktas, Oktay

AU - Whatmore, Roger W.

AU - Roth, Michael

PY - 2014/11/24

Y1 - 2014/11/24

N2 - Highly ordered ferroelectric PbSc0.5Ta0.5O3 crystals were studied by acoustic emission over a wide temperature range. Acoustic emission was found at three characteristic temperatures: 330, 409, and 600K, 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.

AB - Highly ordered ferroelectric PbSc0.5Ta0.5O3 crystals were studied by acoustic emission over a wide temperature range. Acoustic emission was found at three characteristic temperatures: 330, 409, and 600K, 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.

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Ferroelectric precursor behavior of highly cation-ordered PbSc_0.5Ta_0.5O₃ detected by acoustic emission: Tweed and polar nanoregions

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