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Ultrasonic investigations of V 2 O 5 –GeO 2 glass

1993; Taylor & Francis; Volume: 67; Issue: 6 Linguagem: Inglês

10.1080/13642819308219328

1463-6417

Swarupananda Mukherjee, Abhishek Maiti, U. S. Ghosh, C. Basu,

Photorefractive and Nonlinear Optics

Abstract The ultrasonic velocity and attenuation in four different samples of the (V2O5)x−(GeO2)1−x glass system (x = 0.5321,0.5816,0.6635 and 0.7132) have been measured at temperatures between 77 and 300 K using the ultrasonic pulse echo technique at 8 MHz. The elastic moduli and Debye temperatures have been calculated from the velocity data for each composition. The variations in ultrasonic velocity and attenuation with temperature have been explained by a model assuming an asymmetric double-well potential having distributions of both the barrier height and the asymmetry parameter.