Journal of magnetism and magnetic materials vol:240 issue:1-3 pages:595-597
We have studied the flux pinning in a type-II superconducting Pb film covering a regular array of magnetic antidots. The magnetic antidots are made by introducing holes in a Co/Pt multilayer with perpendicular anisotropy. The magnetization curves of the resulting hybrid system are extremely asymmetric with respect to the field polarity, proving that a magnetic contribution dominates the pinning potential. (C) 2002 Elsevier Science B.V. All rights reserved.