Jc Enhancement of MgB2 Superconductors Prepared in High Magnetic Fields


The effect of high magnetic fields on the current carrying properties of both MgB2 bulks and Fe-sheathed tapes was investigated following different thermal sequences. It is found that application of a large magnetic field during processing results in the quite uniform microstructure and the better connectivity between the MgB2 grains. As a result, the Jc of these samples has showed much higher value than that of the MgB2 samples in the absence of magnetic field.

Inst. Elect. Eng., Chinese Academy of Sciences: Y. Ma, A. Xu, X. Zhang, X. Li
IMR, Tohoku University: S. Awaji, K. Watanabe

Reference: Y. Ma, A. Xu, X. Zhang, X. Li, S. Awaji, K. Watanabe, "Enhanced critical current density of MgB2 superconductor synthesized in high magnetic fields", Jpn. J. Appl. Phys. 45 (2006) L493-496.

中国科学アカデミー・電工研究所:Y. Ma, A. Xu, X. Zhang, X. Li
東北大学金属材料研究所:淡路 智,渡辺和雄