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Title: Grain-boundary effects on the resistivity of zinc-doped Y-Ba-Cu-O
Authors: Krishnan, H.
Sankaranarayanan, V.
Radhakrishnan, V.
Subramaniam, C.K.
Srinivasan, R.
Subba Rao, G.V.
Issue Date: 1989
Citation: Physical Review B, 40(4), 2639-2641
Abstract: The electrical resistivity of the granular superconductors, YBa2Cu3-xZnxO7-y with x=0.05, 0.075, 0.1, 0.15, and 0.2, has been measured precisely below the midpoint of the superconducting transition. The expression for electrical resistivity due to Ausloos fits the data over a small temperature region. Besides, the value estimated for the average volume of the intergranular junction on the basis of the above fit is about a few thousands of A3 which is physically not reasonable. On the other hand, the results obtained could be explained better on the basis of a model that assumes that the fraction of the grain boundaries not becoming superconducting at a temperature T follows a Gaussian distribution. ? 1989 The American Physical Society.
ISSN: 1631829
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