A.B. McLean, R.H. Williams
Journal of Physics C: Solid State Physics
A high-resolution Brillouin scattering study of the soft acoustic mode of KH2PO4 in the hydrostatic-pressure range 0-4 kbar is presented. All spectra could be fitted closely by the usual mean-field coupled-mode model. From those fits, the pressure dependence of the ferroelectric-mode relaxation rate is derived. At pressures near and above the tricritical point, the transition can be approached so closely that the Brillouin spectrum becomes strongly overdamped and very narrow ( 50 MHz). Under those conditions, the elastic central peak of even the best available crystal becomes a dominant spectral feature, while the maximum dielectric constant is close to 106. © 1983 The American Physical Society.
A.B. McLean, R.H. Williams
Journal of Physics C: Solid State Physics
O.F. Schirmer, K.W. Blazey, et al.
Physical Review B
J.K. Gimzewski, T.A. Jung, et al.
Surface Science
David B. Mitzi
Journal of Materials Chemistry