Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 53: Poster Session: Superconductivity 1

TT 53.15: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P2-OG2

High field properties of superconducting Ba(Fe_1−xNi_x)₂As₂ thin films — •Stefan Richter^1,2, Fritz Kurth¹, Kazumasa Iida³, Kirill Pervakov⁴, Aurimas Pukenas², Saicharan Aswartham¹, Chiara Tarantini⁵, Jan Jaroszynski⁵, Jens Hänisch⁶, Vadim Grinenko^1,2, Sabine Wurmehl¹, Werner Skrotzki², Bernd Büchner^1,2, Kornelius Nielsch^1,2, and Ruben Hühne¹ — ¹IFW, Dresden — ²TU Dresden — ³Nagoya University, Japan — ⁴RAS, Moscow, Russia — ⁵NHMFL, Tallahassee, USA — ⁶KIT, Karlsruhe

The Fe based superconductors show great potential for high field applications due to their high upper critical field, their small anisotropy and their increased tolerance to small angle grain boundaries. The study of Fe-based superconducting thin films contributes to a better understanding of these correlated electron systems. We present results for epitaxial Ba(Fe_1−xNi_x)₂As₂ thin films, which have been grown with pulsed laser deposition. The behavior of the upper critical field and critical current density has been measured in high magnetic fields up to 35 T. We find an increased slope of the upper critical field near T_c and compared to Co-doped thin films a smaller vortex liquid phase at low temperatures.