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Analysis of magnetic response of critical state in second-generation high temperature superconductor YBa2Cu3Ox wire

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3 Author(s)
Youssef, Ahmed ; Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, CZ-121 16 Prague 2, Czech Republic ; Svindrych, Zdenek ; Janu, Z.

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We have measured magnetic response of second-generation high temperature superconductor YBa2Cu3Ox wire in perpendicular ac field as a function of temperature. We compare 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 and infinitely long cylinder in parallel field. We present a method of linking model and experimental susceptibility. Good agreement of experimental susceptibility with model susceptibility of 2D disk allows noncontact estimation of critical depinning current density and its temperature dependence.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 6 )