Superconductivity near 30 K without copper: the Ba0.6K0.4BiO3 perovskite View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1988-04

AUTHORS

R. J. Cava, B. Batlogg, J. J. Krajewski, R. Farrow, L. W. Rupp, A. E. White, K. Short, W. F. Peck, T. Kometani

ABSTRACT

It is well known that the breakthrough of Bednorz and Müller1 in discovering superconductivity in (La, Ba)2CuO4 was inspired in part by their knowledge of the superconducting properties of Ba(Pb, Bi)O3 (ref. 2). With a transition temperature, Tc, of ∼12 K, that compound was not generally considered anomalous despite the fact that its Tcis 3–5 times higher than that of traditional superconductors with comparable density of states3–5. The increases in Tc for copper-oxide-based materials continue to generate worldwide excitement, but from both a chemical and theoretical point of view it would also be exciting if high-Tcsuperconductivity were observed in another class of materials. Here we report the results of experiments leading us to the single-phase perovskite Ba0.6K0.4BiO3, which has a magnetically determined onset temperature of 29.8 K—a Tc considerably higher than that of conventional superconductors and surpassed only by copper-containing compounds. Superconductivity in this compound occurs within the framework of a three dimensionally connected bismuth-oxygen array. These results suggest that further research toward exploring the limiting Tcs for bismuth-oxide-based, high-temperature superconductors might be fruitful. More... »

PAGES

814-816

References to SciGraph publications

Journal

TITLE

Nature

ISSUE

6167

VOLUME

332

Related Patents

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/332814a0

DOI

http://dx.doi.org/10.1038/332814a0

DIMENSIONS

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