Photoacoustic investigations on the critical composition in Ge-As-Te glasses

Srinivasan, A and Madhusoodanan, KN and Gopal, ESR and Philip, J (1992) Photoacoustic investigations on the critical composition in Ge-As-Te glasses. In: Philosophical Magazine B, 65 (1). pp. 99-106.

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Abstract

The optical band-gap $(E_0)$ and thermal diffusivity $(\alpha)$ of bulk $Ge_{7.5}As_xTe_{92.5-x} (x=20, 40, 45, 50, 55)$ and $Ge_{10}As_xTe_{90-x} (x=15, 20, 35, 40, 45, 50)$ glasses have been determined by the photoacoustic spectroscopy technique. The behaviour of $E_0$ and α have been explained on the basis of the network topology, in terms of the mean coordination number $<\gamma>$. The $E_0$ and $\alpha$ values of both the sets of glasses show subtle features at$<\gamma>=2.6$ indicating the occurrence of a threshold at this value of $<\gamma>$

Item Type: Journal Article Division of Physical & Mathematical Sciences > Physics 29 Nov 2006 27 Aug 2008 12:25 http://eprints.iisc.ernet.in/id/eprint/8818