Crystal Research and Technology
Cryst. Res. Technol. 42, 378 (2007) - Abstract -

Domain structure and birefringence studies on a 0.91Pb(Zn1/3Nb2/3)O3 -0.09PbTiO3 single crystal

G. Singh, I. Bhaumik, S. Ganesahmoorthy, A. K. Karnal, and V. S. Tiwari

Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore- 452 013, India

Keywords PZN-PT, single crystal, domains, birefringence, PLM
PACS 77.80.Bh, 77.80.Dj, 42.25.Lc
DOI 10.1002/crat.200610831

Domain structure and phase transition sequence of 0.91PZN-0.09PT single crystal, grown from high temperature solution, have been analysed using polarised light microscopy. The domain structure of (001)cub cut single crystal exhibit co-existence of rhombohedral and tetragonal phases. The sequence and phase transition temperatures have been determined from temperature dependence of birefringence. A birefringence measurements during heating and cooling reveal a first order nature of phase transition between rhombohedral (R3m) and tetragonal (P4mm). The birefringence was measured with accuracy of 10-3. However, dielectric measurement does not provide any evidence of R3m - P4mm phase transition. It is shown that in-situ analysis of domain structure and phase transition can be used as non-destructive analytical tool for determination of local composition and phase transition sequence.




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