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Elusive superconductivity in polycrystalline samples of layered lanthanum nickelates

Ganguli, AK and Nagarajan, R and Ranga, Rao G and Vasanthacharya, NY and Rao, CNR (1989) Elusive superconductivity in polycrystalline samples of layered lanthanum nickelates. In: Solid State Communications, 72 (2). pp. 195-197.

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Official URL: http://dx.doi.org/10.1016/0038-1098(89)90522-X

Abstract

La2-xNiO4, La2-xSrxNiO4 and related layered nickelates have been investigated for possible presence of superconductivity. While there is clear onset of diamagnetism around 20 K in many of these nickelates, we do not, however, find any anomaly in the electrical resistivity, magnetoresistance or thermopower around 20 K. High energy spectroscopic studies show Ni to be in the 2+ oxidation state accompanied by a substantial proportion of oxygen holes.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 03 Aug 2010 10:51
Last Modified: 19 Sep 2010 06:13
URI: http://eprints.iisc.ernet.in/id/eprint/31112

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