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Enhancement of JC-B Properties in MoSi2 doped MgB2 tapes

Research paper by Xianping Zhang, Yanwei Ma, Zhaoshun Gao, Zhengguang Yu, G. Nishijima, K. Watanabe

Indexed on: 16 Feb '06Published on: 16 Feb '06Published in: Physics - Superconductivity



Abstract

MoSi2 doped MgB2 tapes with different doping levels were prepared through the in-situ powder-in-tube method using Fe as the sheath material. Effect of MoSi2 doping on the MgB2/Fe tapes was investigated. It is found that the highest JC value was achieved in the 2.5 at.% doped samples, more than a factor of 4 higher compared to the undoped tapes at 4.2 K, 10 T, then further increasing the doping ratio caused a reduction of JC. Moreover, all doped tapes exhibited improved magnetic field dependence of Jc. The enhancement of JC-B properties in MoSi2 doped MgB2 tapes is attributed to good grain linkage and the introduction of effective flux pining centers with the doping.