Central peak and acoustic anomalies of the relaxor ferroelectric lead magnesium niobate-lead titanate single crystal studied by the micro-Brillouin scattering | Zendy

Ghulam Shabbir | Zendy; Seiji Kojima | Zendy

Open Access

Central peak and acoustic anomalies of the relaxor ferroelectric lead magnesium niobate-lead titanate single crystal studied by the micro-Brillouin scattering

Author(s) -

Ghulam Shabbir,

Seiji Kojima

Publication year - 2007

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 - 10.1063/1.2768306

Subject(s) - materials science , brillouin scattering , lead titanate , brillouin zone , ferroelectricity , titanate , scattering , condensed matter physics , relaxation (psychology) , acoustic wave , brillouin spectroscopy , single crystal , soft modes , optics , mineralogy , nuclear magnetic resonance , dielectric , ceramic , composite material , chemistry , optoelectronics , physics , laser , psychology , social psychology

Quasielastic central peak and acoustic anomalies in a [001] lead magnesium niobate-lead titanate single crystal have been investigated by the high-resolution micro-Brillouin scattering. Two acoustic anomalies were observed at temperatures, TC-T~415 K and TT-R~348 K. The damping showed a significant dispersion at T~550 K, associated with the enhanced dynamics of local strain fields created by the polar microregions. The temperature evolution of the quasielastic central peak exhibited anomalies in the overall intensity and relaxation time that were associated with the line shape interferences of the central peak and the acoustic mode

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