Ultrasonic investigation of elastic properties and a phase transition in ferroelectric glycine phosphite $NH_3CH_2COOH_3PO_3$ single crystals

Deepthy, A and Bhat, HL and Alex, AV and Philip, J (2000) Ultrasonic investigation of elastic properties and a phase transition in ferroelectric glycine phosphite $NH_3CH_2COOH_3PO_3$ single crystals. In: Physical Review B, 62 (13). pp. 8752-8758.

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Abstract

A detailed ultrasonic study of the elastic properties of glycine phosphite single crystals has been carried out at room temperature as well as across the ferroelectric phase-transition temperature. All 13 elastic stiffness moduli of this monoclinic crystal at room temperature have been determined by measuring the velocities of ultrasonic waves of different polarizations, propagating along different symmetry directions using the pulse echo overlap technique. The anisotropy in elastic wave propagation is established employing polar plots of the phase velocity surfaces in the ab, ac, and bc planes. Variation of selected mode velocities with temperature establishes the reported ferroelectric phase transition in this crystal at 224 K.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Aug 2006
Last Modified:	19 Sep 2010 04:30
URI:	http://eprints.iisc.ac.in/id/eprint/8085

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