Systematic Comparison of Eight Substrates in the Growth of FeSe${}_{0.5}$Te${}_{0.5}$ Superconducting Thin Films

Abstract

We have investigated the crystal structures and superconducting properties of thin films of FeSe${}_{0.5}$Te${}_{0.5}$ grown on eight different substrates. Superconductivity is not correlated with the lattice mismatch; rather it is correlated with the degree of in-plane orientation and with the lattice parameter ratio $c/a$. The best superconducting properties were observed in films on MgO and LaAlO${}_3$ ($T_{\mathrm{c}}^{\mathrm{zero}}$ of 9.5 K). TEM observation showed that the presence or absence of an amorphous-like layer at the substrate surface plays a key role in determining the structural and superconducting properties of the grown films.

16 pages, 4 figures

References in corpus (4)

• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Suppression of superconductivity in FeSe films under tensile strain
• Preparation and superconductivity of iron selenide thin films

Cited by in corpus (15)

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• High Critical Current Density 4 MA/cm2 in Co-Doped BaFe2As2 Epitaxial Films Grown on (La, Sr)(Al, Ta)O3 Substrates without Buffer Layers
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• Optical conductivity of iron-based superconductors
• Enhancement of Transition Temperature in FexSe0.5Te0.5 Film via Iron Vacancies
• High performance FeSe0.5Te0.5 thin films grown at low temperature by pulsed laser deposition
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• The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films
• Investigation of Transport Properties for FeSe${}_{1-x}$Te${}_x$ Thin Films under Magnetic Fields
• Positive and negative chemical pressure effects investigated in electron-doped FeSe films with an electric-double-layer structure
• Pure nematic state in iron-based superconductor
• Relationships between Superconductivity and Nematicity in FeSe${}_{1-x}$Te${}_x$ ($x=0-0.5$) Films Studied by Complex Conductivity Measurements
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• Sulfur-induced magnetism in FeSe${}_{1-x}$S${}_x$ thin films on LaAlO${}_3$ revealed by muon spin rotation/relaxation