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

E. Dul’kin | Zendy; Ekhard K. H. Salje | Zendy; Oktay Aktas | Zendy; R. W. Whatmore | Zendy; Michael Roth | Zendy

Open Access

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

Author(s) -

E. Dul’kin,

Ekhard K. H. Salje,

Oktay Aktas,

R. W. Whatmore,

Michael Roth

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4902511

Subject(s) - ferroelectricity , materials science , polar , acoustic emission , condensed matter physics , electric field , atmospheric temperature range , range (aeronautics) , microstructure , optoelectronics , dielectric , physics , thermodynamics , quantum mechanics , astronomy , metallurgy , composite material

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 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

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