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Ultrasonic measurement of the elastic constants of sodium p-nitrophenolate dihydrate single crystals

Alex, AV and Philip, J and Brahadeeswaran, S and Bhat, HL (2000) Ultrasonic measurement of the elastic constants of sodium p-nitrophenolate dihydrate single crystals. In: Physical Review B: Condensed Matter, 62 (5). 2973 -2975.

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Sodium p-nitrophenolate dihydrate single crystals possess excellent nonlinear optical properties such that they can be used for optical second-harmonic generation. It belongs to the orthorhombic system with the space group Ima2. Slow evaporation or slow cooling techniques can be used to grow good optical quality single crystals from supersaturated solution. All the nine elastic constants of this crystal have been measured using an ultrasonic technique. Samples for measurements have been cut along desired crystallographic axes and the pulse echo overlap technique has been used to measure longitudinal and shear ultrasonic wave velocities along appropriate symmetry directions in the crystal. The McSkimin Delta t criterion has been applied to determine the round trip travel time accurately, from which the nine elastic constants have been evaluated. Temperature variation of selected elastic constants in a limited range have also been measured and reported.

Item Type: Journal Article
Publication: Physical Review B: Condensed Matter
Publisher: The American Physical Society
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Aug 2010 12:18
Last Modified: 19 Sep 2010 06:14
URI: http://eprints.iisc.ac.in/id/eprint/31438

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