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AC magnetization measurements on hot isostatically pressed bulk PbMo/sub 6/S/sub 8/ from 4.2 Kelvin up to T/sub c/ in high magnetic fields

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3 Author(s)
H. D. Ramsbottom ; Dept. of Phys., Durham Univ., UK ; D. N. Zheng ; D. P. Hampshire

A series of variable temperature AC magnetization measurements have been completed from 4.2 K up to T/sub c/ in magnetic fields up to 10 T on bulk PbMo/sub 6/S/sub 8/ (PMS). The properties of hot isostatically pressed (HIP'ed) PMS fabricated at a pressure of 2/spl times/10/sup 8/ N.m/sup -2/ (2000 bar) are compared with those of PMS fabricated at ambient pressure. After HIP'ing the PMS, the critical current density increased by more than a factor of 20 and T/sub c/ increased by 0.5 K. Using Bean's critical state model, the magnetic measurements suggest that the HIP'ed sample has a critical current density of greater than 3/spl times/10/sup 8/ A.m/sup -2/ at 6 K, and 5 T.<>

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:5 ,  Issue: 2 )