Meeting abstract

Brillouin scattering in ferroelastics and quasi-onedimensional ferroelectrics

M. Čopič ; J. Stefan Institute, E. Kardelj University of Ljubljana, Ljubljana, Yugoslavia (Present address: Department of Physics, The City College of New York, N.Y. 10031, U.S.A.)
M. Zgonik ; J. Stefan Institute, E. Kardelj University of Ljubljana, Ljubljana, Yugoslavia
D. L. Fox ; J. Stefan Institute, E. Kardelj University of Ljubljana, Ljubljana, Yugoslavia (Present address: Department of Physics, University of Colorado, Boulder, CO 80309, U.S.A.)
B. B. L avrenčič ; J. Stefan Institute, E. Kardelj University of Ljubljana, Ljubljana, Yugoslavia

Abstract

We have measured the Brillouin spectra of ferroelastic KH₃(SeO₃)₂ in both phases and under influence of the uniaxial stress. The scaled results collapse into the single universal curve thus confirming the validity of Landau model for this case. The Brillouin spectra of quasionedimensional ferroelectric CsH₂PO₄ show no temperature dependence in the ferroelectric region. The critical mode thus seems to be of rather low frequency (< 1 GHz).

Keywords

Hrčak ID:

340924

URI

https://hrcak.srce.hr/340924

Publication date:

15.12.1980.

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