Berlin 2015 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 43: Superconductivity: Fe-based Superconductors – 122
TT 43.5: Talk
Tuesday, March 17, 2015, 15:15–15:30, H 2053
Unusually high critical current of P-doped BaFe2As2 single crystalline thin film — •Fritz Kurth1,2, Chiara Tarantini3, Vadim Grinenko1, Jens Hänisch1,4, Jan Jaroszynski3, Elke Reich1, Yasohiro Mori5, Akihiro Sakagami5, Takahiko Kawaguchi5, Jan Engelmann1,2, Ludwig Schultz1,2, Bernhard Holzapfel4, Hiroshi Ikuta5, Ruben Hühne1, and Kazumasa Iida1,5 — 1IMW, IFW Dresden, Dresden, Germany — 2TU Dresden, Dresden, Germany — 3ASC, NHMFL, Florida, USA — 4ITEP, KIT, Karlsruhe, Germany — 5Department of Crystalline Materials Science, Nagoya University, Nagoya, Japan
Microstructurally clean, isovalently P-doped BaFe2As2 single crystalline thin films have been prepared by molecular beam epitaxy. These films show a superconducting transition temperature (Tc) of over 30 K and high transport self-field critical current densities (Jc) of over 6 MA/cm2 at 4.2 K, which are among the highest for Fe based superconductors. In-field Jc exceeds 0.1 MA/cm2 at µ0H=35 T for H||ab and µ0H=18 T for H||c, respectively, in spite of moderate upper critical fields compared to other FeSCs with similar Tc. This unusually high Jc makes P-doped Ba-122 very favorable for high-field magnet applications.