Ukrainian Journal of Physical Optics

Number 4, Volume 3, 2002

Crystallooptical Properties of Ferroics with the Dimethylammonium Cation (DMA-MeCl4, Me=Cu, Zn; DMA-MnCl3) in the Region of their Phase Transitions

Kapustianyk V., Bazhan V., Korchak Yu., Sveleba S., Mokryi V.

Laboratory of Ferroics Physics, Lviv Ivan Franko National University, 19 Dragomanova Str., 79005 Lviv, Ukraine

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The results of investigations of the crystallooptical effects in the ferroics with dimethylammonium-cation performed in vicinity of phase transitions using Senarmont’s method are presented in the paper. The existence of incommensurate phase in DMA-CuCl4 crystals was confirmed within the framework of 279.5-296 K. Besides, the phase sequence for DMA-ZnCl4 and DMA-MnCl3 compounds has been amended.

Key words: ferroics, incommensurate phase, piezooptic, electrooptic, dimethylammonium.

PACS: 77.80.-e; 78.20.Hp

doi 10.3116/16091833/3/4/258/2002

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