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Science 6 April 2001:
Vol. 292. no. 5514, pp. 65 - 66
DOI: 10.1126/science.1060380
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Perspectives

SUPERCONDUCTIVITY:
How Could We Miss It?

A. M. Campbell

The recent discovery that the simple, well-known compound MgB2 is superconducting at 39 kelvin has galvanized the superconductivity research community into action. In his Perspective, Campbell discusses why this compound was overlooked and how its properties compare with known classes of superconductors.

The author is at the IRC in Superconductivity, University of Cambridge, Cambridge, UK. E-mail: amc1{at}cam.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)