Versatile fluoride substrates for Fe-based superconducting thin films

Abstract

We demonstrate the growth of Co-doped BaFe2As2 (Ba-122) thin films on AEF2 (001) (AE: Ca, Sr, Ba) single crystal substrates using pulsed laser deposition. All films are grown epitaxially despite of a large misfit of -10.6% for BaF2 substrate. For all films a reaction layer is formed at the interface confirmed by X-ray diffraction and by transmission electron microscopy. The superconducting transition temperature of the film on CaF2 is around 27 K, whereas the corresponding values of the other films are around 21 K. The Ba-122 on CaF2 shows identical crystalline quality and superconducting properties as films on Fe-buffered MgO.

5 pages, 6 figures, 2 tables

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Cited by in corpus (19)

• Recent advances in iron-based superconductors toward applications
• Strain induced superconductivity in the parent compound BaFe2As2
• Highly effective and isotropic pinning in epitaxial Fe(Se,Te) thin films grown on CaF2 substrates
• Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2
• Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications
• Tracing the $s_{\pm }$-symmetry in iron pnictides by controlled disorder
• High performance FeSe0.5Te0.5 thin films grown at low temperature by pulsed laser deposition
• Highly textured oxypnictide superconducting thin films on metal substrates
• Enhanced upper critical field in Co-doped Ba122 superconductors by lattice defect tuning
• Surface transport properties of Fe-based superconductors: The influence of degradation and inhomogeneity
• Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields
• Doping and critical-temperature dependence of the energy gaps in Ba(Fe_{1-x}Co_x)_2As_2 thin films
• Investigation of TiO${}_x$ barriers for their use in hybrid Josephson and tunnelling junctions based on Ba-122 thin films
• Realization of epitaxial thin films of the superconductor K-doped BaFe${}_{\text{2}}$As${}_{\text{2}}$
• Insulator-like behavior coexisting with metallic electronic structure in strained FeSe thin films grown by molecular beam epitaxy
• Transport properties of ultrathin BaFe1.84Co0.16As2 superconducting nanowires
• Advanced surface characterization of Ba(Fe${}_{0.92}$Co${}_{0.08}$)${}_2$As${}_2$ epitaxial thin films
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• The thermoelectric conversion efficiency problem: Insights from the electron gas thermodynamics close to a phase transition