Electrical switching, local structure and thermal crystallization in Al-Te glasses

Pumhanmunga, Pumhanmunga and Ramesh, K (2017) Electrical switching, local structure and thermal crystallization in Al-Te glasses. In: MATERIALS RESEARCH BULLETIN, 86 . pp. 88-94.

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Abstract

Bulk AlxTe100-x glasses (17 <= x <= 29) prepared by melt quenching method are found to exhibit threshold switching. The local coordination of Al probed by MAS NMR indicates that Al resides in Al-4], (51)]Al and Al-6] environments. With the addition of Al, there is an increase in C-3(+) defect centers which largely influences the switching properties of Al-Te glasses. The presence of higher coordinated Al crosslinks the network and the network becomes rigid. The switching voltage, glass transition and crystallization temperatures are found to increase with the increase of Al concentration. This indicates that the crosslinking and the rigidity of the structural network increases by the addition of Al. A memory switching material undergoes structural change between amorphous and crystalline states meaning a large structural reorganization. In a highly crosslinked rigid network, structural reorganization becomes difficult and hence results in threshold switching. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	MATERIALS RESEARCH BULLETIN
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	31 Jan 2017 05:26
Last Modified:	31 Jan 2017 05:26
URI:	http://eprints.iisc.ac.in/id/eprint/56030

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