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

doi:10.1063/1.4973522

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

Superconductivity 2017-01-12 v1

Authors: 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.

Keywords

Ba(Fe1-xNix)2As2 thin films superconducting properties high magnetic fields upper critical field vortex liquid phase pulsed laser deposition critical current density

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@article{arxiv.1701.01933,
  title  = {Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields},
  author = {Stefan Richter and Fritz Kurth and Kazumasa Iida and Kirill Pervakov and Aurimas Pukenas and Chiara Tarantini and Jan Jaroszynski and Jens Hänisch and Vadim Grinenko and Werner Skrotzki and Kornelius Nielsch and Ruben Hühne},
  journal= {arXiv preprint arXiv:1701.01933},
  year   = {2017}
}

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Accepted for publication in Applied Physics Letters, 5 figures

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

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