| On the Phase Transitions in Cs 2 CdBr 4 : Dielectric, Dilatometric and Optical Studies |
| S. Dacko and Z. Czapla Institute of Experimental Physics, University of Wroc³aw pl. M. Borna 9, 50-204 Wroc³aw, Poland |
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| Received: August 2, 2002; revised version November 7, 2002; in final form February 14, 2003 |
| Dielectric, dilatometric measurement and polarized microscopic observation were performed for single crystal of Cs 2 CdBr 4 . These investigations showed clearly the phase transitions at 252 K, 236 K and 153 K. The jump-like change of the crystal volume corresponding to the first-order phase transition was found at temperature of 236 K. Ferroelastic domain structure was observed along the a-axis below 236 K and it is preserved below the transition at 153 K. Observation along the c-axis revealed new domain structure below 153 K. |
| DOI: 10.12693/APhysPolA.103.387 PACS numbers: 77.80.Bh |