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arXiv · 1701.01933

Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields

Stefan Richter·Fritz Kurth·Kazumasa Iida·Kirill Pervakov·Aurimas Pukenas·Chiara Tarantini·Jan Jaroszynski·Jens Hänisch·Vadim Grinenko·Werner Skrotzki·Kornelius Nielsch·Ruben Hühne
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Abstract

We report on electrical transport properties of epitaxial Ba(Fe1-xNix)2As2 thin films grown by pulsed laser deposition in static magnetic fields up to 35 T. The thin film shows a critical temperature of 17.2 K and a critical current density of 5.7x10^5 A/cm^2 in self field at 4.2 K while the pinning is dominated by elastic pinning at two-dimensional nonmagnetic defects. Compared to single-crystal data, we find a higher slope of the upper critical field for the thin film at a similar doping level and a small anisotropy. Also an unusual small vortex liquid phase was observed at low temperatures, which is a striking difference to Co-doped BaFe2As2 thin films.

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Stefan Richter, Fritz Kurth, Kazumasa Iida, Kirill Pervakov, Aurimas Pukenas, Chiara Tarantini, Jan Jaroszynski, Jens Hänisch, Vadim Grinenko, Werner Skrotzki, Kornelius Nielsch, Ruben Hühne. 2017-01-08. Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields. https://doi.org/10.1063/1.4973522

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