Superconducting Fe(1+delta)Se(1-x)Te(x) thin films: Growth, characterization and properties

Abstract

Thin films of Fe(1+delta)Se(1-x)Te(x) (delta ~ 0.18 & x ~ 0.5) have been successfully grown on (100) oriented single crystalline SrTiO3 and LaAlO3 substrates by pulsed laser deposition. The crystal structure was characterized by x-ray diffraction, and the superconducting properties by electrical resistivity measurements. X-ray diffraction analysis establishes the epitaxial growth of the films with c-axis orientation. Atomic force microscopy showed a smooth surface morphology for the films grown on SrTiO3 substrates. All the films are observed to be superconducting with a Tc of ~ 8-14 K depending on the deposition conditions. The deposition parameters were optimized to obtain good quality films with Tc comparable to that of the target material.

References in corpus (9)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Psuedo-isotropic upper critical field in cobalt-doped SrFe2As2 epitaxial films
• Superconductivity in Epitaxial Thin Films of Co-Doped SrFe2As2 with Bilayered FeAs Structures and their Magnetic Anisotropy
• Epitaxial growth and anisotropy of La(O,F)FeAs thin films deposited by Pulsed Laser Deposition
• Crystal growth and superconductivity of FeSe_x

Cited by in corpus (10)

• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• Systematic Comparison of Eight Substrates in the Growth of FeSe${}_{0.5}$Te${}_{0.5}$ Superconducting 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
• Atomically-flat, chemically-stable, superconducting epitaxial thin film of iron-based superconductor, cobalt-doped BaFe${}_2$As${}_2$
• Superconductivity of FeSe0.5Te0.5 Thin Films Grown by Pulsed Laser Deposition
• Hall effect in superconducting Fe(Se0.5Te0.5) thin films
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Synthesis and Physical Properties of FeSe1/2Te1/2 Superconductor
• Superconductivity in PbO-type Fe chalcogenides
• Structural and magnetic properties of Fe1+dTe single crystals