Numerical analysis reveals magnetic susceptibility changes in superconductors, suggesting new dissipation mechanisms.
The complex magnetic susceptibility of oxide superconductors near the transition temperature has been computed as a function of temperature and frequency by numerical solution of the non linear, flux diffusion equation. For field values much lower than the upper critical field, a description of dissipative effects in terms of the conventional flux creep and flux fluw pictures is not able to reproduce experimental data.
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F. et al. (1996) studied this question.
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