Effect of nano-C doping on the in-situ processed MgB2 tapes

Details Effect of nano-C doping on the in-situ processed MgB2 tapes Effect of nano-C doping on the in-situ processed MgB2 tapes

2005-09-19

arxiv.org/abs/cond-mat/0509475v3

Journal of Physics: Conference Series 43 (2006) 99-102

Physics

Condensed Matter

Superconductivity

revised manuscript, 4 pages, 4 figures. to be published soon

Scientific paper

The effect of nano-C doping on the microstructure and superconducting properties of Fe-sheathed MgB2 tapes prepared through the in-situ powder-in-tube method was studied. Heat treatment was performed at a low temperature of 650C for 1 h. Scanning electron microscopy investigation revealed that the smaller grain size of MgB2 in the samples with the C-doping. Further, the a-axis lattice parameter and transition temperature decreased monotonically with increasing doping level, which is due to the C substitution for B. High critical current density Jc values in magnetic fields were achieved in the doped samples because of the very fine-grained microstructure of the superconducting phase obtained with C doping.

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