Title :
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
Author :
Ramsbottom, H.D. ; Zheng, D.N. ; Hampshire, D.P.
Author_Institution :
Dept. of Phys., Durham Univ., UK
fDate :
6/1/1995 12:00:00 AM
Abstract :
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.<>
Keywords :
critical current density (superconductivity); hot pressing; lead compounds; magnetisation; molybdenum compounds; superconducting transition temperature; type II superconductors; 10 tesla; 2000 bar; 5 tesla; 6 K; AC magnetization; Bean´s critical state model; PbMo/sub 6/S/sub 8/; ambient pressure; critical current density; high magnetic fields; hot isostatically pressed bulk PbMo/sub 6/S/sub 8/; magnetic measurements; transition temperature; Argon; Coils; Critical current density; Fabrication; Kelvin; Magnetic field measurement; Magnetization; Silicon compounds; Superconducting magnets; Temperature measurement;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
