Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers

Abstract

We demonstrate the growth of epitaxial Fe/Ba(Fe(1-x)Co(x))2As2 (Fe/Ba-122) bilayers on MgO(001) and LSAT(001) single crystal substrates using Pulsed Laser Deposition (PLD). By exploiting the metallic nature of the FeAs tetrahedron in the Ba-122 crystal structure, we achieve a coherent interfacial bond between bcc iron and Co-doped Ba-122. Tc values for both bilayers were close to that of the PLD target. Direct observation of interfacial bonding between Fe and the Ba-122 FeAs sublattice by atomic resolution transmission electron microscopy implies that this bilayer architecture may work for other iron pnictide systems and pave the way for the fabrication of superconducting/ferromagnetic heterostructures.

arXiv comment3 pages, 4 figures

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Cited by in corpus (20)

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• Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical IBAD-MgO Substrates
• Strain induced superconductivity in the parent compound BaFe2As2
• Intrinsic pinning and the critical current scaling of clean epitaxial Fe(Se,Te) thin films
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Influenced of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers
• Versatile fluoride substrates for Fe-based superconducting thin films
• Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe1-xTex thin films
• Thin film growth by pulsed laser deposition and properties of 122-type iron-based superconductor AE(Fe1--xCox)2As2 (AE = alkaline earth)
• Superfluid density measurements of Ba(CoxFe1-x)2As2 films near optimal doping
• The influence of the buffer layer architecture on transport properties for BaFe1.8Co0.2As2 films on technical substrates
• Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin ilms
• Electronic phase diagram of disordered Co doped BaFe2As2
• Thickness dependence of structural and transport properties of Co-doped BaFe2As2 on Fe buffered MgO substrates
• Critical factor for epitaxial growth of cobalt-doped BaFe2As2 films by pulsed laser deposition
• Anomalous scaling behavior in a mixed-state Hall effect of a cobalt-doped BaFe2As2 epitaxial film with a high critical current density over 1 MA/cm2
• BaFe2As2/Fe bilayers with [001]-tilt grain boundary on MgO and SrTiO3 bicrystal substrates
• Tunable superconductivity in Fe-pnictide heterointerfaces by diffusion control