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Study of the Velocity and Damping of Acoustic Waves Obtained by Brillouin Scattering in the Paraelastic Phase in GMO
Author(s) -
Luspin Y.,
Hauret G.
Publication year - 1976
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.2220760214
Subject(s) - brillouin scattering , scattering , phase (matter) , physics , acoustics , optics , condensed matter physics , quantum mechanics , optical fiber
The velocity anomalies and damping of acoustic waves in the paraelastic phase of GMO crystals are calculated on the basis of an interaction Hamiltonian which is proportional to the strain and to the square of the order parameter. Within the assumption of a three dimensional soft mode spectrum, good agreement is obtained with the experimental results.