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Journal №2 for 2015 г.
Article in number:
Critical phenomena in real ferroelectric crystals: theory and experiment
Keywords: phase transitions ferroelectrics critical phenomena defects specific heat
Authors:
B.A. Strukov - Dr. Sc. (Phys.-Math.), Professor, Lomonosov Moscow State University. Е-mail: bstrukov@mail.ru I.V. Shnaidshtein -Ph.D. (Phys.-Math.), Associate Professor, Lomonosov Moscow State University. Е-mail: shnaidshtein@mail.ru
Abstract:
The brief review of history of the theory of ferroelectric phase transitions in crystals with defects. The main provisions based on the Landau theory of phase transitions the model of structural phase transitions created A.P. Levanyuk and A.S. Sigov with colleagues are discussed. We considered the experimental data on the behavior of the heat capacity of a number of model ferroelectric crystals near the phase transition temperature. In particularly, one axis proper and improper ferroelectrics and multi-axis ferroelectric crystals. The advantages of the Levanyuk-Sigov model for interpretation experimental data about specific heat are shown. The number of unresolved problems of interpretation of the experimental date in the critical region are discussed.
Pages: 15-20
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