In-situ growth of superconducting NdFeAs(O,F) thin films by Molecular Beam Epitaxy

Abstract

The recently discovered high temperature superconductor F-doped LaFeAsO and related compounds represent a new class of superconductors with the highest transition temperature (Tc) apart from the cuprates. The studies ongoing worldwide are revealing that these Fe-based superconductors are forming a unique class of materials that are interesting from the viewpoint of applications. To exploit the high potential of the Fe-based superconductors for device applications, it is indispensable to establish a process that enables the growth of high quality thin films. Efforts of thin film preparation started soon after the discovery of Fe-based superconductors, but none of the earlier attempts had succeeded in an in-situ growth of a superconducting film of LnFeAs(O,F) (Ln=lanthanide), which exhibits the highest Tc to date among the Fe-based superconductors. Here, we report on the successful growth of NdFeAs(O,F) thin films on GaAs substrates, which showed well-defined superconducting transitions up to 48 K without the need of an ex-situ heat treatment.

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Cited by in corpus (17)

• Superconductivity in Iron Compounds
• Recent advances in iron-based superconductors toward applications
• Iron-Based Superconductors: current status of materials and pairing mechanism
• Epitaxial growth of FeSe${}_{0.5}$Te${}_{0.5}$ thin films on CaF${}_2$ substrates with high critical current density
• Artificially engineered superlattices of pnictide superconductor
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Thin film growth by pulsed laser deposition and properties of 122-type iron-based superconductor AE(Fe1--xCox)2As2 (AE = alkaline earth)
• Superconductivity at 48 K of heavily hydrogen-doped SmFeAsO epitaxial films grown by topotactic chemical reaction using CaH2
• p-Wave Superconductivity in Iron-based Superconductors
• Transport and magnetic properties of Co-doped BaFe_{2}As_{2} epitaxial thin films
• Lessons from Oxypnictide Thin Films
• Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films
• Evidence of the isoelectronic character of F doping in SmFeAsO(1-x)F(x): a first-principles investigation
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• Anisotropy of the transport properties of NdFeAs(O,F) thin films grown on vicinal substrates
• Novel method to study strain effect of thin films using a piezoelectric-based device and a flexible metallic substrate
• Grain boundary characteristics of oxypnictide NdFeAs(O,F) superconductors