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MgB2, a two-gap superconductor for practical applications

Published online by Cambridge University Press:  16 August 2011

Marina Putti  and
Giovanni Grasso
Marina Putti
Affiliation:
CNR-SPIN and Dipartimento di Fisica, Università di Genova via Dodecaneso 33, 16146 Genova, Italy; e-mail [email protected]
Giovanni Grasso
Affiliation:
Columbus Superconductors SpA, Via delle Terre Rosse 30, 16133 Genova, Italy; [email protected]
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Abstract

The history of superconductivity in MgB2 has been short, but intense. Ten years after its discovery, the two-gap mechanism of superconductivity in MgB2 has been mastered to a considerable extent while developing its superconducting properties in wires that meet the technical and economic requirements of industrial applications. The hope for dry superconductivity (i.e., without any liquid cryogen) using this simple and low-cost material has been recently fulfilled, with current commercial availability of MgB2-based dry MRI machines. We expect that scientific progress in understanding and developing MgB2 conductors will continue, strengthening the base for further deployment of MgB2 in applications. This article presents the main scientific and technical highlights of MgB2, describing its two-gap superconductivity, progress in improving its superconducting properties, the advances toward making MgB2 a fully recognized practical superconductor, and its prospects for ongoing and upcoming applications.

Keywords

Superconductingpowder metallurgy
Type
Research Article
Information
MRS Bulletin , Volume 36 , Issue 8: Superconductivity at 100—Where we’ve been and where we’re going , August 2011 , pp. 608 - 613
Copyright
Copyright © Materials Research Society 2011

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