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The Dynamics of the Domain Boundaries and Soft Lattice Mode in SbSI Crystals
Author(s) -
Burlakov V. M.,
Kiselev S. A.,
Petukhov V. N.,
Anikiev A. A.
Publication year - 1990
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.2221610139
Subject(s) - condensed matter physics , adiabatic process , ferroelectricity , anomaly (physics) , curie temperature , activation energy , oscillation (cell signaling) , materials science , lattice (music) , chemistry , thermodynamics , physics , ferromagnetism , dielectric , biochemistry , optoelectronics , organic chemistry , acoustics
The temperature dependence of the heat capacity of SbSI crystals in the ferroelectric phase is measured both, in the adiabatic and continuous temperature scanning regimes. The anomaly of the heat capacity in the temperature scanning regime is observed near 262 K. On the basis of the anomaly dependence on the temperature scanning rate it is concluded that this anomaly is caused by the movement activation of the domain boundaries. By the position of the anomaly maximum and its width the activation energy E 0 = 0.014 ( T C − T ) eV/K ( T c = 298 K; Curie temperature) and the oscillation frequency of the domain wall at the pinning center μ = 3.2 × 10 9 Hz are determined. The manifestation of the increase of the mobility of domain boundaries in the temperature dependence of the soft ferroelectric mode is discussed.