Physical Sciences and Mathematics Commons^™

Excess Mg Addition Mgb2 /Fe Wires With Enhanced Critical Current Density, Rong Zeng, Lin Lu, Wenxian Li, Jianli Wang, Dongqi Shi, Josip Horvat, S X. Dou, M Bhatia, M D Sumption, Edward W. Collings, Jaimoo Yoo, Mike Tomsic, M Rindfleisch

Australian Institute for Innovative Materials - Papers

MgB₂ /Fe wires with 10 at. % excess Mg produced by in situ powder-in-tube processing werecompared to normal stoichiometric MgB₂ /Fe wires prepared by the same method. It was found thatthe critical current density J_c and the irreversibility field (H_irr) were significantly enhanced forMgB₂ /Fe wires with excess Mg. The transport J_c for 10 at. % Mg excess samples sintered at 800 degrees C, measured at a field of up to 14 T, increased by a factor of 2 compared to that for the normal MgB₂ wires. The best J_c results …