Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity - Poster Session
TT 30.41: Poster
Montag, 31. März 2014, 15:00–19:00, P2
Preparation and characterization of thin films of the unconventional superconductor FeSe — Eike Venzmer, Alexander Kronenberg, and •Martin Jourdan — Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz
The recently discovered class of iron pnictide compounds features a presumably unconventional mechanism of superconductivity. We investigate the iron chalcogenide FeSe, which is the structurally simplest representative of this class of materials. Epitaxial thin films are prepared by rf-sputtering by co-sputtering from separate Fe and Se targets. This method yield superconducting epitaxial thin films on MgO(100) as well as on YAlO3(010) substrates whereas best results have been achieved on MgO(100). The influence of deposition rates and substrate temperature on phase formation, sample homogeneity, morphology and electronic transport properties are discussed. The main advantage of thin films made by sputterdeposition is an improved morphology which is promising for the future integration in planar tunneling junctions for spectroscopic investigations.