AC Susceptibility Techniques Applied to Thin Film Superconductors

摘要: The techniques of ac susceptibility have been used to evaluate several properties thin films: critical temperature, current density, and penetration depth. Two basic approaches used. first I would call “conventional”, in that the sample is mounted a conventional apparatus normally measure bulk samples. Here drive receive coils are both large compared lateral dimensions sample. A second approach unique films involves small These generally designed couple only region near center sample, thus being insensitive exact size or details outer edge film.