The superconducting critical current densities Jc of Nb3Ge and NbN films prepared by sputtering have been studied in fields up to 30 T for the perpendicular field direction H┴ to the film surface and up to 23 T for the parallel field direction H//. The Nb3Ge film exhibits Jc exceeding 1 X 105(1 X 104) A/cm2 in fields below 21(30) T for H┴ and below 23 T for H//. The Jc o f the NbN film for H┴ is higher than 1 X 105 A/cm2 in fields below 21 T, while that for H// is much reduced. Their pinning properties and upper critical fields Hc2 are presented.
ASJC Scopus subject areas
- Physics and Astronomy(all)