COMPREHENSIVE STUDY ON ELECTROPHORETICALLY DEPOSITED BI_2SR_2CACU_2O_(8+o)/AG COMPOSITE SUPERCONDUCTING TAPES

摘要

After 11 repetition of 320-77 K thermal cycles, J_c is reduced to 75-80 percent of its original value. A greater number of cycles resulted in no further degradation. The bending strain tolerance depends not only on bending strain, but also on the thickness of superconducting layers and the sense of bending. The superconducting layers show greater tolerance to compressive than tensile bending strain. Strain tolerance increases as layer thickness decreases. 13 mum layers can withstand strain of 0.2 percent without degradation in J_c. The strain tolerance of our samples is similar to the best results of Ag-clad monofilamentary tapes and is much higher than those for other Ag-cored tapes.