Phase states in rotationally distorted perovskites |
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| Authors: | M. P. Ivliev |
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| Affiliation: | (1) Research Institute of Physics, Rostov State University, pr. Stachki 194, Rostov-on-Don, 344090, Russia |
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| Abstract: | The thermodynamic and crystallochemical conditions determining the types of the rotational phase transitions and their sequence in cubic perovskites are established. It is shown that a decrease in the tolerance factor and a change of the A-cation and its charge stimulates the softening of the rotational-vibrational mode M 3. As an example, the compounds A x Na1 ? x NbO3(A = K, Li) are considered. |
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