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Browse Journals & Magazines > Applied Superconductivity, IE ...> Volume:17 Issue:2 Help

A Study on the Temperature Dependence of the Ginzburg-Landau Parameter, Thermodynamic and Upper Critical Field of Nb3Sn Strands

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5 Author(s)
Oh, Sangjun ; Nat. Fusion Res. Center, Daejeon ; Oh, D.K. ; Bae, C.J. ; Kim, H.-C.
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We report detailed magnetization measurement results for two internal-tin Nb3Sn strands. The paramagnetic background of a Mitsubishi strand is about 4 times larger than that of a KAT strand below the transition temperature, which can be understood as combined effects of Pauli and Langevin paramagnetism. From magnetic relaxation measurement for the KAT strand, a possibility of surface barrier effect is discussed. After subtracting the paramagnetic background, reversible magnetization data are analysed using the Hao-Clem model and the Ginzburg-Landau parameters (kappa), the thermodynamic and the upper critical fields (Bc,Bc2) at various temperatures are obtained. The temperature dependences of kappa, Bc and Bc2 are compared with the recent theoretical calculation results for Nb3Sn and also with widely used empirical formulas.

Published in:
Applied Superconductivity, IEEE Transactions on  (Volume:17 ,  Issue: 2 )

Date of Publication: June 2007

Page(s):
2635 - 2638
ISSN :
1051-8223
INSPEC Accession Number:
9613143
Digital Object Identifier :
10.1109/TASC.2007.899368
Date of Current Version :
23 July 2007
Issue Date :
June 2007
Sponsored by :
The IEEE Council on Superconductivity

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