Behaviour of the Optical Birefringence in Conditions of the "Viscous" Interaction |
| S.A. Sveleba, V.S. Zhmurko Ferroics Physics Laboratory, Department of Unlinear Optics, Ivan Franko National University of Lviv, Dragomanova st. 19, Lviv, 79005, Ukraine and Yu.I. Pankivskyi Laboratory of Ecology, Department of Ecology, Ukrainian State University of Forestry and Wood Technology, O. Kobylyanskoyi st. 1, Lviv, 79005, Ukraine |
| Received: September 23, 1999 |
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| The temperature dependences of optical birefringence δ(Δn) for the principal cuts of [N(CH3)4]2CuCl4 crystals are measured. On the basis of the obtained experimental and theoretical data the anomalous behavior of physical parameters in conditions of the "viscous" interaction of the modulated structure with mobile defects in the incommensurate phase is explained. |
| DOI: 10.12693/APhysPolA.97.337 PACS numbers: 64.70.-p |