Pinning property of Cu/MgB2 system

Sintered Cu/MgB2 system was prepared from the mixture of Mg, B and CuO in the 10% H2/Ar atmosphere at 900°C for 30min. Critical current densities Jc’s were estimated from magnetization data with an extended critical state model. Maximum Jc was confirmed for Cu/MgB2 including 3at.% Cu, in which Jc at...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2006-10, Vol.445-448, p.224-227
Main Authors: Kimishima, Yoshihide, Takami, Satoshi, Uehara, Masatomo, Kuramoto, Tetsuji
Format: Article
Language:English
Subjects:
Critical current density
Critical state model
Magnetization
MgB2
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Summary:Sintered Cu/MgB2 system was prepared from the mixture of Mg, B and CuO in the 10% H2/Ar atmosphere at 900°C for 30min. Critical current densities Jc’s were estimated from magnetization data with an extended critical state model. Maximum Jc was confirmed for Cu/MgB2 including 3at.% Cu, in which Jc at 20K and 1T was 1.48 times larger than that of pure MgB2. Impurity of MgCu2 nano-particles should be effective pinning centers, and flux jump at 5K in low field region was suppressed above 7at.% Cu content in this system.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2006.04.002