Field polarity dependent superconducting properties in a superconductor/ferromagnet hybrid with in-plane magnetic moment |
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Authors: | W Gillijns F Godts GW Ataklti AV Silhanek J Van de Vondel J Sautner B Ilic V Metlushko VV Moshchalkov |
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Affiliation: | 1. INPAC – Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism Group, K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium;2. Department of Electrical and Computer Engineering, University of Illinois, Chicago, IL 60607, USA |
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Abstract: | The transport properties of an Al type-II superconducting thin film covering a Py plain film with a rectangular array of triangular holes are investigated. We show that, although the magnetization of the Py lies in the plane of the structure, both the critical temperature and the critical current are asymmetric with respect to the polarity of the external field, which is applied perpendicularly to the structure. The asymmetric nucleation can be explained in terms of field compensation effects between internal and external magnetic fields, whereas the presence of vortex–antivortex pairs are responsible for the observed features in the critical current. |
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Keywords: | Superconductivity S/F-hybrids |
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