Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 79: Superconductivity: Fe-based Superconductors - 122
TT 79.10: Vortrag
Donnerstag, 10. März 2016, 18:00–18:15, H21
High field properties of superconducting BaFe2−xNixAs2 thin films — •Stefan Richter1, 2, Fritz Kurth1, Kazumasa Iida3, Vadim Grinenko1, Kirill Pervakov4, Chiara Tarantini5, Jan Jaroszynski5, Aurimas Pukenas2, Werner Skrotzki2, Kornelius Nielsch1, and Ruben Hühne1 — 1Institute for Metallic Materials IFW Dresden — 2Technical University Dresden — 3Nagoya University, Japan — 4Russian Academy of Sciences, Russia — 5National High Magnetic Field Laboratory, USA
Fe based superconductors combine the advantages of cuprates (high upper critical field) with the small Hc2 anisotropy of classic low temperature superconductors, which makes them suitable candidates for high field applications. The study of Fe-based superconducting thin films is one crucial step to explore this potential in more detail.
We present results for epitaxial BaFe2−xNixAs2 thin films, which have been successfully grown for the first time using pulsed laser deposition. Superconducting transition temperatures of up to 19 K have been realized in slightly overdoped films, which is in good agreement with results obtained for single crystals. The behavior of the upper critical field and critical current density has been measured in high magnetic fields up to 35 T. The results will be correlated to the observed microstructure and compared to high field data for single crystals with similar composition.
Funding of this work by DFG GRK 1621 is gratefully acknowledged.