Magnetic scattering and superconductivity in Nd1·86Ce0·14CuO4-y

Vijayashree, V. ; Subramaniam, C. K. ; Srinivasan, R. (1991) Magnetic scattering and superconductivity in Nd1·86Ce0·14CuO4-y Bulletin of Materials Science, 14 (3). pp. 741-745. ISSN 0250-4707

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Nd1·86Ce0.14CuO4-y is superconducting below about 20 K and electrons are considered to be responsible for superconductivity in these materials as in the case of Ln2-x Cex CuO4-y and Ln2-x Thx CuO4-y. Structurally these materials are not very different from the p-type superconductors La2-x Srx CuO4-y . In both these types of superconductors, the parent compounds are antiferromagnetically-ordered insulators. The induction of holes or electrons by substitution destroys magnetic interactions and brings about superconductivity. Peng and coworkers have studied the resistivity variation of both superconducting and nonsuperconducting Nd1·85Ce0·15CuO4-y and have found a decrease in resistivity with temperature, obeying a ln T dependence in the superconducting samples. Such a variation was not seen by them in the nonsuperconducting samples. They ascribe the ln T variation seen in their superconducting samples to arise from magnetic scattering of electrons. To study whether such an effect exists, Nd1·86Ce0·14CuO4-y was subjected to various annealing conditions and the resistivity behaviour is presented here. Our results differ from those of Peng et al.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Electron Superconductors; Magnetic Scattering; In T Variation; Resistivity
ID Code:57935
Deposited On:30 Aug 2011 10:23
Last Modified:18 May 2016 09:09

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