Critical current densities of powder-in-tube MgB[sub 2] tapes fabricated with nanometer-size Mg powder

Yamada, H.; Hirakawa, M.; Kumakura, H.; Matsumoto, A.; Kitaguchi, H.
March 2004
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1728
Academic Journal
We fabricated powder-in-tube MgB[sub 2]/Fe tapes using a powder mixture of nanometer-size Mg and commercial amorphous B and investigated the transport properties. High-purity nanometer-size Mg powder was fabricated by applying the thermal plasma method. 5–10 mol % SiC powder doping was tried to enhance the J[sub c] properties. We found that the use of nanometer-size Mg powder was effective to increase the J[sub c] values. The transport J[sub c] values of the nondoped and 10 mol % SiC-doped tapes prepared with nanometer-size Mg powder reached 90 and 250 A/mm2 at 4.2 K and 10 T, respectively. These values were about five times higher than those of the tapes prepared with commercial Mg powder. © 2004 American Institute of Physics.


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