Observation of a low-temperature acoustic anomaly in lanthanum lead zirconate titanate | Zendy

Ghulam Shabbir | Zendy; JaeHyeon Ko | Zendy; Seiji Kojima | Zendy

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Observation of a low-temperature acoustic anomaly in lanthanum lead zirconate titanate

Author(s) -

Ghulam Shabbir,

JaeHyeon Ko,

Seiji Kojima

Publication year - 2004

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 - 10.1063/1.1847710

Subject(s) - materials science , lead zirconate titanate , ferroelectricity , lead titanate , titanate , anomaly (physics) , lanthanum , condensed matter physics , dipole , ceramic , piezoelectricity , brillouin zone , mineralogy , dielectric , composite material , optoelectronics , inorganic chemistry , chemistry , physics , organic chemistry

High-resolution Brillouin scattering experiments have been performed to investigate the low temperature "aging" effect in lanthanum lead zirconate titanate (PLZT) relaxor ferroelectric ceramics. From the temperature dependence of the frequency shift of longitudinal acoustic mode, an acoustic anomaly was observed at T0~46 K in these ceramics with clear "aging" effect below T0. The results have been discussed in the light of stepwise freezing of the related degrees of freedom causing transition from proper to improper dipole glassy states at T0

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