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

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

2005-04-10

arxiv.org/abs/cond-mat/0504229v1

Physics

Condensed Matter

Superconductivity

6 pages, 7 figures

Scientific paper

10.1103/PhysRevB.72.064509

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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