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On the Acoustic and Electroacoustic Properties of Incommensurate {N(CH 3 ) 4 } 2 CuBr 4 Crystals
Author(s) -
Kityk A. V.,
Soprunyuk V. P.
Publication year - 1994
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.2221810107
Subject(s) - hydrostatic pressure , phase diagram , materials science , phase (matter) , ferroelectricity , phase transition , condensed matter physics , hydrostatic equilibrium , transverse plane , phenomenological model , thermodynamics , physics , optoelectronics , quantum mechanics , engineering , dielectric , structural engineering
The influence of hydrostatic pressure on the temperature dependences of transverse USW velocities is studied in the region of phase transitions and of triple points of {N(CH 3 ) 4 } 2 CuBr 4 crystals. The pressure‐temperature phase diagram is obtained. The linear electroacoustic effect is detected only in the region of the ferroelectric phase. The anomalies of acoustic and electroacoustic properties are considered within the framework of a phenomenological theory.