The influence of the buffer layer architecture on transport properties for BaFe1.8Co0.2As2 films on technical substrates

Abstract

A low and almost temperature independent resistance in the normal state and an anomalous peak effect within the normal-superconducting transition have been observed in BaFe${}_{1.8}$Co${}_{0.2}$As${}_2$/Fe bilayers, prepared on IBAD-MgO/Y${}_2$O${}_3$ buffered technical substrates. A resistor network array sufficiently reproduces this effect, assuming an increase of the electrical conductance between tape and film with decreasing buffer layer thickness. Based on this model we evaluated the influence of this effect on the critical current density and successfully reconstructed the superconducting transition of the bilayer.

References in corpus (5)

• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Biaxially textured cobalt-doped BaFe2As2 films with high critical current density over 1 MA/cm2 on MgO-buffered metal-tape flexible substrates
• Strong Tc dependence for strained, epitaxial Ba(Fe1-xCox)2As2 thin films
• Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers
• Influenced of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers

Cited by in corpus (5)

• Recent advances in iron-based superconductors toward applications
• Versatile fluoride substrates for Fe-based superconducting thin films
• Electronic phase diagram of disordered Co doped BaFe2As2
• Highly textured oxypnictide superconducting thin films on metal substrates
• BaFe2As2/Fe bilayers with [001]-tilt grain boundary on MgO and SrTiO3 bicrystal substrates