Elastic properties of cubic relaxor ferroelectrics |
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| Authors: | A. I. Fedoseev S. G. Lushnikov |
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| Affiliation: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |
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| Abstract: | Comparative analysis of the elastic properties of PbMg1/3Nb2/3O3 (PMN) and PbMg1/3Ta2/3O3 (PMT) crystals has been performed. The temperature dependences of the elastic moduli C 11, C 12, and C 44 are presented. These curves exhibit anomalies near the Burns temperature for both crystals. Additional anomalies are observed in the vicinity of the suppressed ferroelectric transition (T C ～ 210 K) in PMN. Nontrivial frequency dispersion of the elastic moduli has been revealed for PMN. |
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