Epitaxial LaFeAsOF thin films grown by pulsed laser deposition

Abstract

Superconducting and epitaxially grown LaFeAsOF thin films were successfully prepared on (001)-oriented LaAlO3 substrates using pulsed laser deposition. The prepared thin films show exclusively a single in-plane orientation with epitaxial relation (001)[100] parallel to (001)[100] and a FWHM value of 1deg. Furthermore, resistive measurement of the superconducting transition temperature revealed a Tc90 of 25K with a high residual resistive ratio of 6.8. The applied preparation technique, standard thin film pulsed laser deposition at room temperature in combination with a subsequent post annealing process, is suitable for fabrication of high quality LaFeAsO1-xFx thin films. A high upper critical field of 76.2 T was evaluated for magnetic fields applied perpendicular to the c-axis and the anisotropy was calculated to be 3.3 assuming single band superconductivity.

6 pages, 4 Figures

References in corpus (8)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single Crystals
• Superconducting properties of Fe-based layered superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs
• Single crystal of superconducting SmFeAsO1-xFy grown at high pressure
• Epitaxial growth and anisotropy of La(O,F)FeAs thin films deposited by Pulsed Laser Deposition
• Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy

Cited by in corpus (13)

• Superconductivity in Iron Compounds
• Strong Tc dependence for strained, epitaxial Ba(Fe1-xCox)2As2 thin films
• 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
• Josephson junction in cobalt-doped BaFe2As2 epitaxial thin films on (La, Sr)(Al, Ta)O3 bicrystal substrates
• Direct observation of a nodeless superconducting energy gap in the optical conductivity of iron-pnictides
• Critical current scaling and anisotropy in oxypnictide superconductors
• In-situ growth of superconducting NdFeAs(O,F) thin films by Molecular Beam Epitaxy
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• DC superconducting quantum interference devices fabricated using bicrystal grain boundary junctions in Co-doped BaFe2As2 epitaxial films
• Point-contact study of ReFeAs(1-x)Fx (Re=La, Sm) superconducting films
• Lessons from Oxypnictide Thin Films
• Vortex glass-liquid transition and activated flux motion in an epitaxial, super-conducting NdFeAs(O,F) thin film