Enhanced critical-current in P-doped BaFe2As2 thin films on metal substrates arising from poorly aligned grain boundaries
arXiv:1606.01477 · doi:10.1038/srep36828
Abstract
Thin films of the iron-based superconductor BaFe2(As1-xPx)2 (Ba122:P) were fabricated on polycrystalline metal-tape substrates with two kinds of in-plane grain boundary alignments (well aligned (4 deg.) and poorly aligned (8 deg.)) by pulsed laser deposition. The poorly aligned substrate is not applicable to cuprate-coated conductors because the in-plane alignment >4 deg. results in exponential decay of the critical current density (Jc). The Ba122:P film exhibited higher Jc at 4 K when grown on the poorly aligned substrate than on the well-aligned substrate even though the crystallinity was poorer. It was revealed that the misorientation angles of the poorly aligned samples were less than 6 deg., which are less than the critical angle of an iron-based superconductor, cobalt-doped BaFe2As2 (~9 deg.), and the observed strong pinning in the Ba122:P is attributed to the high-density grain boundaries with the misorientation angles smaller than the critical angle. This result reveals a distinct advantage over cuprate-coated conductors because well-aligned metal-tape substrates are not necessary for practical applications of the iron-based superconductors.
References in corpus (18)
- Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
- Nearly Isotropic superconductivity in (Ba,K)Fe2As2
- Advantageous grain boundaries in iron pnictide superconductors
- Template engineering of Co-doped BaFe2As2 single-crystal thin films
- Weak-link behavior of grain boundaries in superconducting Ba(Fe1-xCox)2As2 bicrystals
- Significant enhancement of upper critical fields by doping and strain in Fe-based superconductors
- 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
- High Critical Current Density 4 MA/cm2 in Co-Doped BaFe2As2 Epitaxial Films Grown on (La, Sr)(Al, Ta)O3 Substrates without Buffer Layers
- Artificially engineered superlattices of pnictide superconductor
- Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical IBAD-MgO Substrates
- Atomically-flat, chemically-stable, superconducting epitaxial thin film of iron-based superconductor, cobalt-doped BaFeAs
- Thin Film Growth and Device Fabrication of Iron-Based Superconductors
- High critical-current density with less anisotropy in BaFe2(As,P)2 epitaxial thin films: Effect of intentionally grown c-axis vortex-pinning centers
- Thin film growth by pulsed laser deposition and properties of 122-type iron-based superconductor AE(Fe1--xCox)2As2 (AE = alkaline earth)
- Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2
- Highly textured oxypnictide superconducting thin films on metal substrates
- Critical factor for epitaxial growth of cobalt-doped BaFe2As2 films by pulsed laser deposition
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- High-field transport properties of a P-doped BaFe2As2 film on technical substrate
- Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks
- BaFe2(As1-xPx)2 (x = 0.22-0.42) thin films grown on practical metal-tape substrates and their critical current densities
- Nanoscale Texture and Microstructure in NdFeAs(O,F)/IBAD-MgO Superconducting Thin Film with Superior Critical Current Properties
- Particulate Generation on Surface of Iron Selenide Films by Air Exposure
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