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Superconductivity of La2?ySryCu1?xNixO4+? (y = 0.1, 0.2; 0less-than-or-equals, slantxless-than-or-equals, slant0.5) The hole-compensating effect of Ni

Bhat, V and Rao, CNR and Honig, JM (1992) Superconductivity of La2?ySryCu1?xNixO4+? (y = 0.1, 0.2; 0less-than-or-equals, slantxless-than-or-equals, slant0.5) The hole-compensating effect of Ni. In: Physica C: Superconductivity, 191 (1-2). pp. 271-276.

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Official URL: http://dx.doi.org/10.1016/0921-4534(92)90658-Y

Abstract

Magnetization measurements below 50 K on ceramic La2?ySryCu1?xNixO4+? (y = 0.1, 0.2; 0less-than-or-equals, slantxless-than-or-equals, slant0.5) show a progressive diminution of superconducting properties with increasing x. The larger suppressive action of Ni in the y=0.1 system than that for y=0.2 is attributed to the hole-compensating effect of Ni3+. The assumption that nickel is in the 3+ state satisfactorily explains: (1) the reduction in hole concentration, (2) a right-shift of the Tc versus y curve with x, and (3) the low magnetic moment carried by Ni atoms, in the La2?ySryCu1?xNixO4+? system.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: High-Tc Superconductivity;High-Pressure Oxygen;Sr-Cu-O; Substitution;System;State;Disappearance;Phases;Defect;Oxides
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 30 May 2011 06:07
Last Modified: 30 May 2011 06:07
URI: http://eprints.iisc.ernet.in/id/eprint/37741

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