On the effect of ordering on vibrational spectrum of relaxor ferroelectric PbSc1/2Ta1/2O3 in paraphase |
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| Authors: | S G Lushnikov S N Gvasaliya E A Rogacheva I G Siny |
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| Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |
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| Abstract: | The effect of the ordering of Sc3+ and Ta5+ ions on the behavior of the phonon subsystem in the relaxor ferroelectric PbSc1/2Ta1/2O3 from the numerous AB′ x B″ x?1O3 family has been studied. The nature of an additional contribution to the light-scattering spectra has been analyzed on the experimental data on Raman scattering in PbSc1/2Ta1/2O3, SrAl1/2Ta1/2O3, SrAl1/2Nb1/2O3, and BaMg1/3Ta2/3O3 compounds and inelastic neutron scattering in PbSc1/2Ta1/2O3. It is shown that broadening of the lines in the Raman spectra of PbSc1/2Ta1/2O3 crystals is caused by additional scattering by phonons from various points of the Brillouin zone. |
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