Min Yang, Jeremy Schaub, et al.
Technical Digest-International Electron Devices Meeting
Recent Brillouin-Rayleigh scattering experiments performed on the xy shear mode of KDP near the ferroelectric transition temperature are reviewed. The static central peak has been removed by annealing, producing paraelectric spectra in perfect agreement with mean-field theory. Application of a static electric field causes the transition to become non-symmetry breaking. This suppresses the soft mode and generates a heat-diffusion central peak in the paraelectric phase. At the critical field there are no microscopic critical fluctuations, and hence no opalescence, although several thermodynamic quantities are predicted to diverge classically. Under sufficient hydrostatic pressure, the transition becomes continuous in the absence of field, and the spectra exhibit an increased relaxation rate. © 1980, Taylor & Francis Group, LLC. All rights reserved.
Min Yang, Jeremy Schaub, et al.
Technical Digest-International Electron Devices Meeting
Heinz Schmid, Hans Biebuyck, et al.
Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
J.V. Harzer, B. Hillebrands, et al.
Journal of Magnetism and Magnetic Materials
I. Morgenstern, K.A. Müller, et al.
Physica B: Physics of Condensed Matter