Phase (<i>x</i>,<i>T</i>) and (<i>p</i>,<i>T</i>) diagrams of TlIn(S<sub>1−<i>x</i></sub>Se<sub><i>x</i></sub>)<sub>2</sub>polycrystal in the compositional range 0 ≤<i>x</i>≤ 0.15
П. П. ГураничDepartment of Optics, Uzhhorod National University, Uzhhorod, UkraineР. Р. РосулDepartment of Optics, Uzhhorod National University, Uzhhorod, UkraineО. О. ГомоннайDepartment of Optics, Uzhhorod National University, Uzhhorod, UkraineВ. М. РубішUzhhorod Scientific and Technological Centre for Materials of Optical Information Carriers, Institute for Information Recording, NAS of Ukraine, Uzhhorod, UkraineA. V. GomonnaiInstitute of Electron Physics, NAS of Ukraine, Uzhhorod, UkraineА. Г. СливкаDepartment of Optics, Uzhhorod National University, Uzhhorod, UkraineP. HuranychDepartment of Optics, Uzhhorod National University, Uzhhorod, Ukraine
2019yi
ABI
Abstract
Temperature and pressure dependences of dielectric characteristics of TlIn(S1−xSex)2 polycrystals for 0 ≤x≤ 0.15 are studied. Their phase (x, T) and (p, T) diagrams are built. With increasing Se content a broadening of the temperature interval of existence of the incommensurate phase is observed. Pressure coefficients of phase transition temperature shift are determined. A complex polycritical region in the pressure range 550–600 MPa is found.
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