Effects of textured micro-structure on the critical current anisotropy of MgB2 superconductor tapes

MgB_2超导体被认为是一种很有前途的超导磁体材料。在这项研究中，我们研究了临界电流各向异性和非原位粉末管处理的MgB2磁带的微观结构之间的相关性，从利用临界电流各向异性的角度获得一些改善临界电流性能的线索。硬鞘材料通过卷致织构的磁带芯，相对于不同的取向关系的磁带和所施加的字段之间的临界电流在高磁场增强。此外，使用粉浆浇注法制造织构粉末的结果报告。

The MgB2 superconductor has been regarded as a promising material for superconducting magnet uses. In this study, we investigated the correlation between the critical current anisotropy and the microstructure of the ex situ powder-in-tube processed MgB2 tapes for obtaining a clue to some improvements in the critical current properties from the viewpoint of making use of the critical current anisotropy. The hard sheath material enhanced the critical current in high magnetic fields through the roll-induced texturing of the tape core, with respect to different orientation relations between the tape and the applied field. Additionally, results of using the slip casting method for fabricating textured powders are reported.