Light scattering study of acoustic phonon modes and central peaks in Pb[(Mg1∕3Nb2∕3)0.45Ti0.55]O3 single crystals | Zendy

JaeHyeon Ko | Zendy; Seiji Kojima | Zendy; Alexei A. Bokov | Zendy; ZuoGuang Ye | Zendy

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Light scattering study of acoustic phonon modes and central peaks in Pb[(Mg1∕3Nb2∕3)0.45Ti0.55]O3 single crystals

Author(s) -

JaeHyeon Ko,

Seiji Kojima,

Alexei A. Bokov,

ZuoGuang Ye

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 - 10.1063/1.2825416

Subject(s) - condensed matter physics , curie temperature , phonon , softening , materials science , brillouin scattering , brillouin zone , relaxation (psychology) , scattering , polar , crystal (programming language) , optics , physics , ferromagnetism , composite material , psychology , social psychology , astronomy , optical fiber , computer science , programming language

The dynamic polar nanoregions (PNRs) which form below the Burns temperature and determine the unique properties of relaxor ferroelectrics were predicted [Tinte et al., Phys. Rev. Lett. 97, 137601 (2006)] to be pinned to the quenched chemically ordered regions (CORs) usually observed in lead-containing relaxors. In Pb[(Mg1/3Nb2/3)0.45Ti0.55]O3 crystal where CORs are known to be absent, we have found the phenomena typically related to the relaxation of dynamic PNRs, namely, the significant Brillouin quasielastic scattering, the softening of the longitudinal acoustic mode, and the deviation from the Curie-Weiss law above the Curie point. This implies that PNRs may appear in crystals without CORs

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