Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 20: SC: Fabrication and Characterization of Iron-Based and Other Superconductors

TT 20.9: Talk

Wednesday, March 24, 2010, 11:45–12:00, H19

Anisotropy and vortex matter of LaFeAs(O,F) — •Martin Kidszun, Silvia Haindl, Jens Hänisch, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, Institute for Metallic Materials, PO - Box 270116, D-01171 Dresden, Germany

The successful growth of epitaxial LaFeAs(O,F) thin films opens the way to study intrinsic properties of this novel superconductors. Exploring the magnetic phase diagram up to 42 T we were able to investigate the temperature dependence and anisotropy of the upper critical field as well as the irreversibility field in this iron oxypinictide. The anisotropy of the irreversibility field was determined using a combination of resistive measurements in high magnetic fields and critical current densitie measurements. A substantial report about the anisotropy and the vortex matter will be given in this conribution.