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Information × Registration Number 0213U003907, 0111U010236 , R & D reports Title Thermodynamics of critical phenomena in the vicinity of special points on the phase diagrams of ferroics popup.stage_title Head Burak Yaroslav Volodymyrovych, Registration Date 07-02-2013 Organization Institute of Physical Optics named after O.G. Vlokh of Ministry of Education and Science of Ukraine popup.description2 The methods of growing of K2xRb2(1-x)Cd2(SO4)3 langbeinite family crystals and solid solutions on their base from an aqueous solution and by Bridgman techniques were tested. On the base of the physical properties studies of K2xRb2(1-x)Cd2(SO4)3 (x = 0,1) langbeinite crystals the three phase transitions were found at T1 = 120 K, T2 = 86 K and T3 = 79,7 K temperatures. On the base of the temperature dependences of the acoustic waves velocity, the thermal expansion coefficients and the optical birefringence of Sn2P2 (SexS1-x) solid solutions studies the critical indeces of the order parameter for Sn2P2S6 and Sn2P2(Se0.72S0.28)6 crystals were determined at atmospheric pressure, indicating that the thermodynamic conditions, at which Sn2P2(SexS1-x)6 solid solutions are resided, are approaching to the tricritical point conditions when the concentration of selenium is chanding from x = 0 to x = 0,28. Product Description popup.authors Адамів Володимир Теодорович Бурак Ярослав Володимирович Васильків Юрій Васильович Влох Ростислав Орестович Кваснюк Олексій Іванович Мартинюк-Лотоцька Ірина Юріївна Мись Оксана Григорівна Падляк Богдан Володимирович Саварин Вікторія Іванівна Сай Андрій Степанович Теслюк Ігор Михайлович popup.nrat_date 2020-04-02 Close