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Dielectric spectrum of BaTiO 3 single crystals
Author(s) -
Turik A. V.,
Shevchenko N. B.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220950230
Subject(s) - permittivity , dielectric , tetragonal crystal system , condensed matter physics , materials science , relaxation (psychology) , ferroelectricity , single crystal , dielectric permittivity , phase transition , dispersion (optics) , frequency domain , piezoelectricity , phase (matter) , optics , nuclear magnetic resonance , chemistry , optoelectronics , physics , composite material , psychology , social psychology , mathematical analysis , mathematics , organic chemistry
The dielectric spectra of BaTiO 3 single‐domain and polydomain tetragonal crystals with 180° domain structure are investigated over the wide range of frequencies 10 3 to 10 10 Hz. It is shown that the dielectric permittivity ε 33 of the single‐domain crystals has three regions of dispersion including two regions of the high‐frequency relaxation. There is no relaxation contribution to the permittivity ε 11 of the single‐domain crystals. In polydomain crystals the decrease of the low‐frequency dielectric permittivity and the increase of the high‐frequency one, due to the domain piezoelectric interaction, are observed. The results obtained are discussed from the point of view of the structural disorder in a real crystal. Conclusions are made concerning the ion potential relief character and the phase transition nature in BaTiO 3 .