Epitaxial growth and anisotropy of La(O,F)FeAs thin films deposited by Pulsed Laser Deposition

Abstract

LaFeAsO1-xFx thin films were deposited successfully on (001)-oriented LaAlO3 and MgO substrates from stoichiometric LaFeAsO1-xFx polycrystalline targets with fluorine concentrations up to x = 0.25 by PLD. Room temperature deposition and post annealing of the films yield nearly phase pure films with a pronounced c-axis texture and a strong biaxial in-plane orientation. Transport measurements show metallic resistance and onset of superconductivity at 11 K. Hc2(T) was determined by resistive measurements and yield Hc2 values of 3 T at 3.6 K for B||c and 6 T at 6.4 K for B||ab.

11 pages, 5 figures

References in corpus (6)

• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Single crystal of superconducting SmFeAsO1-xFy grown at high pressure
• Superconductivity in Epitaxial Thin Films of Co-Doped SrFe2As2 with Bilayered FeAs Structures and their Magnetic Anisotropy
• Angular dependence of resistivity in the superconducting state of NdFeAsO${}_{0.82}$F${}_{0.18}$ single crystals

Cited by in corpus (11)

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• Superconducting properties of sulfur-doped iron selenide
• 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
• Scaling behaviour of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films
• Atomically-flat, chemically-stable, superconducting epitaxial thin film of iron-based superconductor, cobalt-doped BaFe${}_2$As${}_2$
• Critical current scaling and anisotropy in oxypnictide superconductors
• Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy
• DC superconducting quantum interference devices fabricated using bicrystal grain boundary junctions in Co-doped BaFe2As2 epitaxial films
• Critical factor for epitaxial growth of cobalt-doped BaFe2As2 films by pulsed laser deposition
• Lessons from Oxypnictide Thin Films