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

References in corpus (14)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Advantageous grain boundaries in iron pnictide superconductors
• Strong Tc dependence for strained, epitaxial Ba(Fe1-xCox)2As2 thin films
• Superconductivity in Epitaxial Thin Films of Co-Doped SrFe2As2 with Bilayered FeAs Structures and their Magnetic Anisotropy
• Epitaxial growth of FeSe${}_{0.5}$Te${}_{0.5}$ thin films on CaF${}_2$ substrates with high critical current density
• High Critical Current Density 4 MA/cm2 in Co-Doped BaFe2As2 Epitaxial Films Grown on (La, Sr)(Al, Ta)O3 Substrates without Buffer Layers
• Water-induced superconductivity in SrFe2As2
• Atomically-flat, chemically-stable, superconducting epitaxial thin film of iron-based superconductor, cobalt-doped BaFe${}_2$As${}_2$
• Existence, character and origin of surface-related bands in the high temperature iron pnictide superconductor BaFe_{2-x}Co_{x}As_{2}
• Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers
• DC superconducting quantum interference devices fabricated using bicrystal grain boundary junctions in Co-doped BaFe2As2 epitaxial films
• BaFe_{1.8}Co_{0.2}As_2 thin film hybrid Josephson junctions
• Bicrystalline Grain Boundary and Hybrid SNS Junctions Based on Ba-122 Thin Films

Cited by in corpus (8)

• Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2
• High performance FeSe0.5Te0.5 thin films grown at low temperature by pulsed laser deposition
• Highly textured oxypnictide superconducting thin films on metal substrates
• Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields
• 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
• Resistivity in Co-doped Ba-122: comparison of thin films and single crystals
• Advanced surface characterization of Ba(Fe${}_{0.92}$Co${}_{0.08}$)${}_2$As${}_2$ epitaxial thin films