Piezo-optic properties of incommensurately modulated K2ZnCl4 crystals

Autor:	V. I. Stadnyk, R. S. Brezvin, Z. O. Kogut
Rok vydání:	2011
Předmět:	Phase transition Materials science Birefringence Condensed matter physics Physics::Optics Soliton (optics) General Chemistry Atmospheric temperature range Condensed Matter Physics Stress (mechanics) Crystal Spontaneous polarization Dispersion (optics) General Materials Science
Zdroj:	Crystallography Reports. 56:84-88
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s1063774510061148
Popis:	The effect that uniaxial pressures along the principal crystallophysical directions have on the dispersion and temperature dependences of the birefringence in incommensurate K2ZnCl4 crystals has been investigated in a wide temperature range. This parameter has been established to be fairly sensitive to uniaxial pressures. The spectral and temperature dependences of combined piezo-optic coefficients are analyzed. Significant anomalies of these coefficients are found at the incommensurate-commensurate phase transition. They are due to the change in the induced birefringence that results from spontaneous polarization and to the significant effect of uniaxial stress on the soliton structure of the crystal. The contributions that the electrooptic effect, the elasto-optic effect, and the order parameter make to the spontaneous changes in the piezooptic coefficients are separated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::36020ddc9a65afc5cc5aa3cc3ef1286a https://doi.org/10.1134/s1063774510061148 Zobrazit plný text záznamu Plný text ve formátu PDF