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High Critical Current Density of a MgB2 Bulk Superconductor High-pressure Synthesized Directly from the Elements

Published online by Cambridge University Press:  31 January 2011

C-Q. Jin ,
S-C. Li ,
J-L. Zhu ,
F-Y. Li ,
Z-X. Liu  and
R-C. Yu
C-Q. Jin
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
S-C. Li
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
J-L. Zhu
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
F-Y. Li
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
Z-X. Liu
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
R-C. Yu
Affiliation:
Laboratory for extreme condition physics, Institute of Physics, Center for condensed matter physics, andBeijing high pressure research center, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, P.R. China
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Abstract

We report the property studies of a MgB2 superconductor with high critical current density. The MgB2 superconductor was readily fabricated through a direct high-pressure synthesis of the respective elements. The obtained high-density MgB2 undergoes a sharp superconducting transition at 39 K. The bulk critical current density (Jc) of the sample was calculated on the basis of Bean's critical state model, and rather high critical current densities over a wide temperature range were obtained in comparison with the ambient prepared samples. The results highlight that high-pressure sintering would be a promising way to produce and search for this kind of intermetallic boride and the related superconductors.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 3 , March 2002 , pp. 525 - 527
Copyright
Copyright © Materials Research Society 2002

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