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Considerable enhancement of the critical current in a superconducting film by magnetized magnetic strip

D. Y. Vodolazov·B. A. Gribkov·S. A. Gusev·A. Yu. Klimov·Yu. N. Nozdrin·V. V. Rogov·S. N. Vdovichev
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Abstract

We show that a magnetic strip on top of a superconducting strip magnetized in a specified direction may considerably enhance the critical current in the sample. At fixed magnetization of the magnet we observed diode effect - the value of the critical current depends on the direction of the transport current. We explain these effects by a influence of the nonuniform magnetic field induced by the magnet on the current distribution in the superconducting strip. The experiment on a hybrid Nb/Co structure confirmed the predicted variation of the critical current with a changing value of magnetization and direction of the transport current.

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D. Y. Vodolazov, B. A. Gribkov, S. A. Gusev, A. Yu. Klimov, Yu. N. Nozdrin, V. V. Rogov, S. N. Vdovichev. 2005-04-10. Considerable enhancement of the critical current in a superconducting film by magnetized magnetic strip. https://doi.org/10.1103/physrevb.72.064509

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