Abstract
We measured the temperature dependence of the ac susceptibility in Bi2Sr2CaCu2O8 single crystals. The penetration fieldH* was determined, at different temperatures, from the field dependence ofX″ in the framework of the critical state model. Using a very simple formula, we estimated the values of the critical current density near Tc, which are consistent with the usually reported data for this material.
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Mandache, S., Crisan, A., Aldica, G. et al. Magnetic AC susceptibility in Bi2Sr2CaCu2O8 single crystals. J Supercond 10, 211–214 (1997). https://doi.org/10.1007/BF02770553
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DOI: https://doi.org/10.1007/BF02770553