A.P. Malozemoff, B. Barbara, et al.
Journal of Applied Physics
We investigated the stabilization of magnetic flux in a high-temperature superconductor (a proton-irradiated Y1Ba2Cu 3O7 crystal), by operating with subcritical current density J. Using the thermal history to obtain an induced current density J≤Jc, we observed a drastically reduced relaxation rate dM/dt (M=magnetization), after "flux creep annealing". The results show that the field gradient ∼J∼M determined the relaxation rate, independent of the sample's H-T history, in agreement with recent theory.
A.P. Malozemoff, B. Barbara, et al.
Journal of Applied Physics
L. Krusin-Elbaum, A.P. Malozemoff, et al.
Journal of Applied Physics
A.P. Malozemoff, T. Worthington, et al.
Physical Review B
B. Barbara, A.P. Malozemoff, et al.
Physical Review Letters