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Acoustic Studies of Low‐Temperature Phase Transitions in LiKSO 4 Crystals
Author(s) -
Borisov B. F.,
Charnaya E. V.,
Vinogradova M. Ya.
Publication year - 1997
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 - 10.1002/1521-3951(199701)199:1<51::aid-pssb51>3.0.co;2-1
Subject(s) - atmospheric temperature range , phase transition , attenuation , landau theory , condensed matter physics , materials science , phase (matter) , shear (geology) , acoustic attenuation , optics , physics , thermodynamics , quantum mechanics , composite material
Acoustic studies of low‐temperature phase transitions in LiKSO 4 crystals were performed in the range 165 to 290 K. Anomalies in velocity and attenuation were found around 204 and 185 K under cooling and around 195 and 260 K under warming. A dip in the velocity of the yx shear wave was observed at the III–IV phase transition. The results are treated in the framework of the Landau theory and fluctuation models.