D. Di Gioacchino et al., Frequency dependence of HTS ac harmonic susceptibility in the Kim-Andersonand collective pinning vortex glass models, IEEE APPL S, 11(1), 2001, pp. 3924-3927
By numerically solving the nonlinear magnetic flux diffusion equation, the
temperature dependence of the sc magnetic susceptibility have been computed
at different frequencies in the framework of the collective pinning vortex
glass and of the Kim-Anderson models. In particular the frequency dependen
ce of the amplitude of the third harmonic have been analyzed. Such dependen
ce is determined by the dynamic curvature of the E-J characteristics, norma
lized to the dynamic resistivity.