Abstract
We investigated Tc, Bc2 and Jc in a residual strain state of pre-strain for bronze processed multifilamentary Nb3Sn wires. The influence of a sample holder to the measured Jc value due to the thermal contraction and the relationship between a Jc criterion and an n-value in the form of V=KIn were clarified. It turned out that the temperature dependence of Bc2 under strain obeys [1-(2/3)(l.c.T/1.75 Tc)2] near T=0 and (1-T/Tc) near Tc. Moreover, the establishment of the temperature scaling law on the global pinning force Fp was confirmed in practical Nb3Sn wires.
