The normalized decay rate R of magnetization due to thermally activated flux creep is typically given by R≃kBT/Uc, where kB is the Boltzmann constant, T is the absolute temperature and Uc is the effective pinning potential. Some observed data for high-Tc superconductors show that R increases with increasing T, while in other studies, R takes a peak at a certain temperature Tm below the critical temperature Tc, where Tm decreases with increasing external magnetic field. These temperature dependences of R are explained systematically on the basis of a recent theory of flux creep developed by the authors.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)