Correlations between elastic, calorimetric, and polar properties of ferroelectric PbSc0.5Ta0.5O3 (PST)

Gan Linyu; Francisco Javier Romero; Victorino Franco; José María Martín-Olalla; María Carmen Gallardo; Ekhard K.H. Salje; Yumei Zhou; Oktay Aktas

doi:10.1063/1.5116753

Correlations between elastic, calorimetric, and polar properties of ferroelectric PbSc_0.5Ta_0.5O₃ (PST)

Gan Linyu
, Francisco Javier Romero
, Victorino Franco
, José María Martín-Olalla
, María Carmen Gallardo
, Ekhard K.H. Salje
, Yumei Zhou
, Oktay Aktas

School of Materials Science and Engineering

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

8 Scopus citations

Abstract

Calorimetric, elastic, and polar properties of ferrolectric lead scandium tantalate PbSc_0.5Ta_0.5O₃ with 65% cation order have been investigated in the vicinity of the paraelectric-ferroelectric transition at T trans = 295 K. Comparison of temperature dependencies of the excess specific heat and elastic properties indicates that both anomalies stem from thermal fluctuations of order parameters in three dimensions. These fluctuations are consistent with the tweed microstructure. This transition is driven by several coupled thermodynamic order parameters, as evidenced by a strongly nonlinear scaling of the excess entropy with the squared ferroelectric polarization.

Original language	English
Article number	161904
Journal	Applied Physics Letters
Volume	115
Issue number	16
DOIs	https://doi.org/10.1063/1.5116753
State	Published - 14 Oct 2019

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10.1063/1.5116753

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title = "Correlations between elastic, calorimetric, and polar properties of ferroelectric PbSc0.5Ta0.5O3 (PST)",

abstract = "Calorimetric, elastic, and polar properties of ferrolectric lead scandium tantalate PbSc0.5Ta0.5O3 with 65\% cation order have been investigated in the vicinity of the paraelectric-ferroelectric transition at T trans = 295 K. Comparison of temperature dependencies of the excess specific heat and elastic properties indicates that both anomalies stem from thermal fluctuations of order parameters in three dimensions. These fluctuations are consistent with the tweed microstructure. This transition is driven by several coupled thermodynamic order parameters, as evidenced by a strongly nonlinear scaling of the excess entropy with the squared ferroelectric polarization.",

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doi = "10.1063/1.5116753",

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T1 - Correlations between elastic, calorimetric, and polar properties of ferroelectric PbSc0.5Ta0.5O3 (PST)

AU - Linyu, Gan

AU - Romero, Francisco Javier

AU - Franco, Victorino

AU - Martín-Olalla, José María

AU - Gallardo, María Carmen

AU - Salje, Ekhard K.H.

AU - Zhou, Yumei

AU - Aktas, Oktay

PY - 2019/10/14

Y1 - 2019/10/14

N2 - Calorimetric, elastic, and polar properties of ferrolectric lead scandium tantalate PbSc0.5Ta0.5O3 with 65% cation order have been investigated in the vicinity of the paraelectric-ferroelectric transition at T trans = 295 K. Comparison of temperature dependencies of the excess specific heat and elastic properties indicates that both anomalies stem from thermal fluctuations of order parameters in three dimensions. These fluctuations are consistent with the tweed microstructure. This transition is driven by several coupled thermodynamic order parameters, as evidenced by a strongly nonlinear scaling of the excess entropy with the squared ferroelectric polarization.

AB - Calorimetric, elastic, and polar properties of ferrolectric lead scandium tantalate PbSc0.5Ta0.5O3 with 65% cation order have been investigated in the vicinity of the paraelectric-ferroelectric transition at T trans = 295 K. Comparison of temperature dependencies of the excess specific heat and elastic properties indicates that both anomalies stem from thermal fluctuations of order parameters in three dimensions. These fluctuations are consistent with the tweed microstructure. This transition is driven by several coupled thermodynamic order parameters, as evidenced by a strongly nonlinear scaling of the excess entropy with the squared ferroelectric polarization.

UR - https://www.scopus.com/pages/publications/85073791494

U2 - 10.1063/1.5116753

DO - 10.1063/1.5116753

M3 - 文章

AN - SCOPUS:85073791494

SN - 0003-6951

VL - 115

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 161904

ER -

Correlations between elastic, calorimetric, and polar properties of ferroelectric PbSc_0.5Ta_0.5O₃ (PST)

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