Logarithmic temperature dependence of the resistivity of Nd2-xCexCuO4-y

Radhakrishnan, Vijayashree ; Subramaniam, C. K. ; Sankaranarayanan, V. ; Subba Rao, G. V. ; Srinivasan, R. (1990) Logarithmic temperature dependence of the resistivity of Nd2-xCexCuO4-y Physica C: Superconductivity, 167 (1-2). pp. 53-58. ISSN 0921-4534

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0921-4534(90)90484-V


Single phase compounds of Nd2-xCexCuO4-y(0.14 ≤ x ≤ 0.18) were made by the standard solid state reaction. The as-prepared nonsuperconducting samples were further annealed in various reducing atmospheres to induce superconductivity. All of the samples, except that with a concentration x=0.18, exhibited superconductivity after an annealing treatment at 850°C for 6 h in a vacuum of 10−5 Torr. Magnetisation measurments confirmed the Meissner fraction to be around 20% for these compounds. Resistivity measurements were performed on samples which were annealed under different conditions. The resistivity showed a ln T dependence, which was prominent in those samples in which superconductivity was not observed. In the samples showing zero resistivity, the ln T term is absent or present with a much smaller coefficient than in the nonsuperconducting samples.

Item Type:Article
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ID Code:52029
Deposited On:02 Aug 2011 08:13
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