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arXiv · 0812.4608

Strong influence of a magnetic layer on the critical current of Nb bridge in finite magnetic fields due to surface barrier effect

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

We measured the critical current of the bilayer Nb/Co in the applied magnetic field. When the magnetic field was tilted to the axis which was perpendicular to the plane of the bilayer we observed a large difference in critical currents flowing in opposite directions. We found that the largest critical current of the bilayer exceeded the critical current of the superconductor without Co layer in a wide range of the tilted magnetic fields. The theory which takes into account the surface barrier effect for vortex entry and magnetic field of the magnetic layer gave a quantitative explanation of our experimental results.

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D. Y. Vodolazov, B. A. Gribkov, A. Yu. Klimov, V. V. Rogov, S. N. Vdovichev. 2008-12-25. Strong influence of a magnetic layer on the critical current of Nb bridge in finite magnetic fields due to surface barrier effect. https://doi.org/10.1063/1.3030983

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