Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1508453 | Cryogenics | 2007 | 5 Pages |
Abstract
A novel MgB2 superconducting wire has been fabricated by the in situ powder-in-tube method with fine B powders (0.25 μm) and coarse Mg ones (150 μm). The core of this wire has a fibrous structure, which consists of a lot of MgB2 filaments. The critical current density Jc has been found to increase with decreasing a wire size, and Jc of the 1 mm wire is 1.4 × 104 A/cm2 at a temperature of 20 K in a field of 4 T. In addition, it has been revealed from an experiment with a MgB2 tape made by flat-rolling the wire that filament surfaces have a substantial contribution to flux pinning.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
D. Uchiyama, K. Mizuno, T. Akao, M. Maeda, T. Kawakami, H. Kobayashi, Y. Kubota, K. Yasohama,