Physics – Condensed Matter – Superconductivity
Scientific paper
2010-09-06
Physics
Condensed Matter
Superconductivity
Scientific paper
We have measured magnetic response of second-generation high temperature superconductor YBa2Cu3Ox wire and Nb thin film in perpendicular ac field as a function of temperature. We compare experimental complex ac susceptibility to the calculated susceptibility based on the model of Bean's critical-state response in two-dimensional (2D) disk in perpendicular field. The harmonic analysis is needed for comparison between the model and the experimental data. We present a method of linking model and experimental susceptibility. Good agreement of experimental susceptibility with model susceptibility of 2D disk allows contactless estimation of critical depinning current density and its temperature dependence.
Banicova Lucia
Janu Zdenek
Svindrych Zdenek
Youssef Ahmed
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