Physica c-superconductivity and its applications vol:468 issue:7-10 pages:741-744
Vortex V Conference on Nanoscience and Engineering in Superconductivity location:Rhodos, Greece date:08-14 September 2007
The transport properties of Al superconducting thin films covering arrays of Co/Pt pinning centers of two different size;3 are measured and compared. Detailed magnetization characterization of the dots allow us to gain control over the average magnetization of the dots through the application of an external magnetic field. By increasing the magnetization of the dots a gradually increasing shift of the superconducting phase boundary is observed. This shift is explained in terms of vortex-antivortex pair generation. It is shown that the resulting field-induced-superconductivity is strongly dependent on the size of the magnetic dots. (C) 2008 Elsevier B.V. All rights reserved.