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Magnetic flux diffusion in high-Tc superconductors: step-response and AC-susceptibility

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2 Author(s)
Castro, H.F. ; Inst. de Phys. Exp., Lausanne Univ., Switzerland ; Rinderer, L.

Theoretical calculations for the response of high-Tc ceramic superconductors to external magnetic field-step and ac excitations were performed. Despite our simplifying assumptions, the analytical solutions we obtain provide a clear insight into the flux penetration phenomenon in these materials. We discuss the characteristic time of flux penetration, the ac-susceptibility, and their dependence on field amplitude and frequency, Our results are in good agreement with experiments.

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Applied Superconductivity, IEEE Transactions on  (Volume:8 ,  Issue: 3 )