Optical properties of TlInS2layered crystal under pressure
- 1 March 2012
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 32 (1) , 39-42
Abstract
Studies of the optical properties of TlInS2 layered ferroelectric with an incommensurate phase were performed. In the temperature range 190–220 K at atmospheric pressure, we observed rotation of the plane of the optical axes and a change of the angle between the optical axes of the crystal. The temperature dependences of birefringence and its anomalous part were investigated, the anomalies at T c =192 K and T i =214 K, corresponding to structural phase transitions, were revealed. Pressure increase in the range p atm≤p<470 MPa is shown to result in a shift of the birefringence anomalies towards higher temperatures.Keywords
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