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Effect of CuO addition on the high-field and high-pressure behavior of microwave-prepared lead vanadate glasses

Published online by Cambridge University Press:  31 January 2011

B. Vaidhyanathan ,
S. Asokan  and
K. J. Rao
B. Vaidhyanathan
Affiliation:
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India
S. Asokan
Affiliation:
Department of Instrumentation, Indian Institute of Science, Bangalore-560 012, India
K. J. Rao
Affiliation:
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India
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Abstract

High-field and high-pressure behavior of microwave-prepared xCuO:(45−x) PbO: 55V2O5 (x = 0 to 20) glasses were investigated for the first time. It was found that the addition of CuO significantly alters the nonlinear I–V characteristics of these glasses; while the glasses with x = 10 exhibit a current-controlled negative resistance behavior associated with a memory type transition, glasses with x = 15 show a threshold-type behavior. Remarkable differences were also noticed in the high-pressure electrical resistivity behavior between the low- and high-CuO-containing glasses. Corroborative thermal, electrical, microscopic, and spectroscopic measurements were carried out to understand the structure–property relations. A structural model was proposed, which is based on the chemical nature of the constituents present in the glasses. The model accounts well for the various observed properties of these glasses.

Type
Article
Information
Journal of Materials Research , Volume 15 , Issue 2 , February 2000 , pp. 518 - 529
Copyright
Copyright © Materials Research Society 2000

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