0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Current issue Ukr. J. Phys. 2014, Vol. 58, N 9, p.853-856
Stadnyk V.Yo., Kashuba O.Z., Brezvin R.S., Matviishyn I.M., Rudysh M.Y.
Ivan Franko National University of L’viv
(8, Kyrylo i Mefodiy Str., Lviv 79005, Ukraine; e-mail: firstname.lastname@example.org)
Birefringence Properties of Uniaxially Compressed K2SO4 crystal
Section: Solid matter
Original Author's Text: Ukrainian
Abstract: The influence of the uniaxial mechanical pressure ?m ? 200 bar on the temperature dependence of the birefringence ?ni in K2SO4 crystals in an interval of 300–1000 K has been studied. The uniaxial pressure was found to affect only the magnitude but not the behavior of d?ni/dT. A significant baric shift of the ferroelastic phase transition point toward higher (for ?x) and lower (for ?y and ?z pressures) temperatures was observed, as well as a baric shift of the temperature interval, where the intermediate phase exists, near the phase transition point.
Key words: birefringence, uniaxial press, phase transition.