Electrochemical oxygen intercalation in La2CuO4 prepared by nitrates method: Microstructural effects

To determine microstructural effects in the electrochemical O intercalation for La2CuO4 and the relative abundance of the two superconducting phases (Tc=33 and 44 K), this oxide was prepared using the nitrates method, which involves dissolution of La and Cu oxides in nitric acid. The product was pre...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2000-11, Vol.341-348, p.1977-1978
Main Authors: Michel, C.R., Casan˜-Pastor, N.
Format: Article
Language:English
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Summary:To determine microstructural effects in the electrochemical O intercalation for La2CuO4 and the relative abundance of the two superconducting phases (Tc=33 and 44 K), this oxide was prepared using the nitrates method, which involves dissolution of La and Cu oxides in nitric acid. The product was pressed as pellets. A narrow grain size distribution and density higher than 95% rT was obtained. After electrochemical O intercalation, at RT, this material gave a main superconducting phase with Tc=33 K, whereas porous pellets obtained from the same oxide, with intermediate grinding, gave a Tc=44 K. 5 refs.
ISSN:0921-4534
DOI:10.1016/S0921-4534(00)01178-3