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TT: Fachverband Tiefe Temperaturen

TT 15: Superconductivity: Poster Session

TT 15.29: Poster

Tuesday, February 26, 2008, 14:00–18:00, Poster B

Geometrical Confinement in Superconducting/Ferromagnetic Heterostructures — •Silvia Haindl¹, Tanya Shapoval¹, Thomas Thersleff¹, Jens Ingolf Mönch², Ludwig Schultz¹, and Bernhard Holzapfel¹ — ¹Institute for Metallic Materials, IFW Dresden, PF 270116, 01171 Dresden, Germany — ²Institute for Integrative Nanosciences, IFW Dresden, PF 270116, 01171 Dresden, Germany

In superconducting thin films, geometrical confinement and thus microstructuring has a strong influence on the nucleation of superconductivity. Additionally, in superconducting/ferromagnetic thin films an influence on the superconducting properties is exerted by the magnetic stray field of the ferromagnet. Superconducting/ferromagnetic heterostructures were prepared by UHV pulsed laser deposition (PLD). Ferromagnetic dots with and without microstructuring were covered by a superconducting thin Nb film. In order to demonstrate the direct influence of the geometrical confinement, a recently developed polishing technique was employed to reduce the thickness of the superconducting layer.