Brillouin scattering studies of ferroelectric triglycine selenate sound velocity versus uniaxial pressure at T∼TC

Autor:	Z Tylczynski, J.R Fernandez-del-Castillo, B Mroz, Julio A. Gonzalo
Rok vydání:	1999
Předmět:	Transverse plane Phase transition Materials science Brillouin Spectroscopy Condensed matter physics Phonon Brillouin scattering Dielectric Electrical and Electronic Engineering Condensed Matter Physics Polarization (waves) Ferroelectricity Electronic Optical and Magnetic Materials
Zdroj:	Physica B: Condensed Matter. 262:433-437
ISSN:	0921-4526
DOI:	10.1016/s0921-4526(98)01091-6
Popis:	Brillouin spectroscopy was used to study the influence of uniaxial pressure σb, applied along the b polar direction, on transverse polarization fluctuations in ferroelectric TGSe single crystals. The experiments were performed with σb varying from 0 to 8 MPa at temperatures from 285 to 305 K. It was found that increasing pressure shifts the phase transition temperature towards lower values, producing a slowing down the relaxation process at T∼TC. It was also possible to induce the ferroelectric to paraelectric phase transition at a constant temperature by varying the uniaxial pressure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b2ca08d5a789b573a4e050ac2f70aefc https://doi.org/10.1016/s0921-4526(98)01091-6 Zobrazit plný text záznamu Full Text from ScienceDirect