Abstract
The effect of uniaxial stress onto Ag-sheathed BiPbSrCaCuO on the Jc-B characteristics was investigated. It was shown that uniaxial stress was effective for the increase of Jc and n-value by the improvement of packing density and grain alignment. Larger Jc was obtained for the sample which included the low-Tc phase before pressing and sintering process. The existence of the low-Tc phase is expected to be useful for a good contact between grains after the growth of the high-Tc phase. The pinning potential was calculated from the measurement of the decay of the remanent magnetization at 4.2K, and it was revealed out that sample including the low-Tc phase at the initial stage had higher pinning potential.
