Interrelation of antiferrodistortive and ferroelectric phase transitions in Sr1−xAxTiO3 (A=Ba, Pb) |
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| Authors: | EP Smirnova R Kunze OE Kvyatkovskii |
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| Institution: | a Laboratory for Physics of Ferroelectricity, A.F. Ioffe Physical-Technical Institute, 26 ul. Politechnicheskaya, 194021 St Petersburg, Russian Federation
b Institute of Solid State and Materials Research Dresden, D-1069 Dresden, Germany |
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| Abstract: | A dielectric and ultrasonic velocity study of antiferrodistortive and ferroelectric phase transitions in Sr1−xAxTiO3 (A=Ba, Pb) is reported. It is shown that both phase transitions co-exist at x<0.03 but at the higher concentration the ferroelectric phase transition entirely suppresses the antiferrodistortive phase transition. The experimentally obtained phase diagrams are discussed in the framework of the Landau phenomenological theory. |
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| Keywords: | 64 70 Kb 77 80 Bh 77 84 Dy 77 90 +k |
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