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

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.

Accepted for publication in Applied Physics Letters, 5 figures

References in corpus (7)

• Superconductivity induced by Ni doping in BaFe${}_2$As${}_2$
• Advantageous grain boundaries in iron pnictide superconductors
• Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2
• Versatile fluoride substrates for Fe-based superconducting thin films
• Bulk magnetization and strong intrinsic pinning in Ni-doped BaFe2As2 single crystals
• Unusually high critical current of clean P-doped BaFe2As2 single crystalline thin film
• Influence of substrate type on transport properties of superconducting FeSe0.5Te0.5 thin films

Cited by in corpus (2)

• Optical and Hidden Transport Properties of BaFe${}_{1.91}$Ni${}_{0.09}$As${}_2$ Film
• THz electrodynamics of BaFe${}_{1.91}$Ni${}_{0.09}$As${}_2$ film analyzed in the framework of multiband Eliashberg theory