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Infrared and Raman spectroscopy of [Pb(Zn.sub.1/3./sub.Nb.sub.2/3./sub.)O.sub.3./sub.].sub.0.92./sub.-[PbTiO.sub.3./sub.].sub.0.08./sub. and [Pb(Mg.sub.13./sub.Nb.sub.2/3./sub.)O.sub.3./sub.].sub.0.71./sub.-[PbTiO.sub.3./sub.].sub.0.29./sub.single crystals

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    0134162 - FZU-D 20030054 RIV US eng J - Journal Article
    Kamba, Stanislav - Buixaderas, Elena - Petzelt, Jan - Fousek, Jan - Nosek, J. - Bridenbaugh, P.
    Infrared and Raman spectroscopy of [Pb(Zn1/3Nb2/3)O3]0.92-[PbTiO3]0.08 and [Pb(Mg13Nb2/3)O3]0.71-[PbTiO3]0.29single crystals.
    Journal of Applied Physics. Roč. 93, č. 2 (2003), s. 933-939. ISSN 0021-8979. E-ISSN 1089-7550
    R&D Projects: GA ČR GA202/01/0612; GA ČR GA202/00/1198; GA AV ČR IAA1010213
    Institutional research plan: CEZ:AV0Z1010914
    Keywords : relaxor ferroelectrics * infrared spectroscopy * phonons * polar nanoclusters
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 2.171, year: 2003

    The low-frequency dielectric anomaly in the paraelectric phase is caused by contribution of dynamic polar nanoclusters with the main dispersion in the microwave range. Infrared and Raman spectra confirm the locally doubled unit cell.The lowest-frequency transverse optical (TO1) phonon mode active in the infrared spectra is underdamped in contrast to the recent result of inelastic neutron scattering.
    Permanent Link: http://hdl.handle.net/11104/0032086

     
     

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