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Field polarity dependent nucleation of superconductivity in quasi-one-dimensional magnetic templates |
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| Authors: | GW Ataklti AV Silhanek J Van de Vondel W Gillijns A Belkin G Karapetrov VV Moshchalkov |
| Institution: | 1. INPAC – Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium;2. Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA;3. Physics Division, Illinois Institute of Technology, Chicago, IL 60616, USA |
| Abstract: | We investigate the nucleation of superconductivity in an Al/Al2O3/Py trilayer system by electrical transport measurements. Magnetic force microscopy images taken at room temperature show that the 0.7 μm thick Py-film form stripes of magnetic domains with alternating out-of-plane stray field. After applying a strong out of plane magnetic field H the superconductor/normal phase boundary becomes asymmetric with respect to H = 0. This lack of field polarity symmetry results from the unbalanced size distribution of domains with opposite polarity. |
| Keywords: | S/F hybrids Magnetic domain Magnetic templates |
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