Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Superconductivity: Poster Session
TT 19.21: Poster
Montag, 7. März 2016, 15:00–18:00, Poster D
Epitaxial growth of Fe-based superconductor thin films — Sven Meyer, •Jens Hänisch, and Bernhard Holzapfel — Institut für Technische Physik, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
The Fe-based superconductors (FBS), discovered in 2008, are not only interesting for possible applications due to their large upper critical fields and low anisotropies, but also for basic understanding of unconventional superconductivity. With their properties, they constitute a link between the classic low-Tc superconductors (low anisotropies, low thermal fluctuations, s-wave type symmetry) and the oxocuprates (Tc up to 55 K, large Hc2, unconventional pairing). Their multi-band nature reminds of MgB2. We prepare thin films of FBS in the so called 122 family, namely Co- and P-doped BaFe2As2 to investigate application relevant properties, such as critical current density Jc, by pulsed laser deposition using a frequency-tripled Nd:YAG laser (λ = 355 nm). Microstructure and chemical composition will be investigated by XRD, AFM and SEM, and electrical transport using a 14 T PPMS. The results are compared to literature data on films grown at different wavelengths [1].
H. Hiramatsu et al., APL 104, 172602 (2014)