Calculations of low-field magnetization curves of superconducting granular systems are carried out by means of a critical-state model that follows from the Josephson-junction network description of this class of superconductors. An approximate analytical expression of the temperature-dependent effective critical current density Jc is derived. General critical-state calculations which explicitly take account of temperature effects are thus specified to the case of a cylindrically symmetric polycrystalline superconducting sample. The calculated low-field magnetic properties are seen to be in good agreement with experimental results

Temperature dependence of the low-field magnetization of granular superconductors

DE LUCA, Roberto;PACE, Sandro;POLICHETTI, Massimiliano
1996

Abstract

Calculations of low-field magnetization curves of superconducting granular systems are carried out by means of a critical-state model that follows from the Josephson-junction network description of this class of superconductors. An approximate analytical expression of the temperature-dependent effective critical current density Jc is derived. General critical-state calculations which explicitly take account of temperature effects are thus specified to the case of a cylindrically symmetric polycrystalline superconducting sample. The calculated low-field magnetic properties are seen to be in good agreement with experimental results
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/3115419
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