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
2009 Applied Physics Letters  
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
more » ... fect for vortex entry and magnetic field of the magnetic layer gave a quantitative explanation of our experimental results.
doi:10.1063/1.3030983 fatcat:wnpgtb4emffthmtd5tp23x56wy