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Kinetics based evidence for intermediate phase in Ge15Te85 - In-x(x) chalcogenide glasses

Varma, G Sreevidya and Chaturvedi, Abhishek and Ramamurty, U and Asokan, S (2017) Kinetics based evidence for intermediate phase in Ge15Te85 - In-x(x) chalcogenide glasses. In: JOURNAL OF NON-CRYSTALLINE SOLIDS, 471 . pp. 251-255.

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Official URL: http://doi.org/10.1016/j.jnoncrysol.2017.06.006

Abstract

This paper presents the thermal studies carried out using Differential Scanning Calorimetry on Ge15Te85 - In-x(x) glasses (1 <= x <= 11) to fmd glass transition temperature, T-g and crystallization temperature, T-x. Further, the variation of T-g and T-x for different heating rates have been studied. The composition dependence of T, T-g and stability factor, Delta T have been investigated. The crystallization kinetics has been studied by a non-isothermal method; the activation energy of crystallization, E-x has been determined using Kissinger method whereas glass transition activation energy, E-g using Kissinger as well as Tool-Narayanaswami-Moynihan (TNM) methods for all the compositions. The results obtained reveal the opening of an intermediate phase, IP in the composition range 2 <= x <= 7. T-g, T-x and Delta T increases continuously across the IP region. The E-x exhibits a plateau and E-g follow a bell shaped curve in the IP region.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 16 Sep 2017 06:23
Last Modified: 16 Sep 2017 06:23
URI: http://eprints.iisc.ac.in/id/eprint/57796

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