Effects of additive Ce on reaction diffusion process and superconducting properties of Nb/sub 3/Sn by tin-rich method

Alloying of bronze with trace (0.1w%) mixed rare-earth metals (REM) obviously enhanced the growth rate of Nb/sub 3/Sn layer and remarkably increased its superconducting critical current I/sub c/ (6T) at the low field, and electron microprobe analyses showed that instead of entering Nb/sub 3/Sn layer, the rare-earth metals had highly concentrated on the interface of CuSn matrix and Nb/sub 3/Sn layer. The authors study the effects of Ce addition to tin-rich alloy on the reaction diffusion process and superconducting properties of Nb/sub 3/Sn obtained by tin-rich method, and compare the above specimen with that of Ti addition to tin-rich alloy