Weak-link behavior of grain boundaries in superconducting Ba(Fe1-xCox)2As2 bicrystals

Abstract

We show that despite the low anisotropy, strong vortex pinning and high irreversibility field Hirr close to the upper critical field Hc2 of Ba(Fe1-xCox)2As2, the critical current density Jgb across [001] tilt grain boundaries (GBs) of thin film Ba(Fe1-xCox)2As2 bicrystals is strongly depressed, similar to high-Tc cuprates. Our results suggest that weak-linked GBs are characteristic of both cuprates and pnictides because of competing orders, low carrier density, and unconventional pairing symmetry.

To appear in Applied Physics Letters

References in corpus (13)

• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1-xCox)2As2
• Upper critical fields and thermally-activated transport of Nd(O_0.7F_0.3)FeAs single crystal
• Determination of anisotropic Hc2 up to 60 T in (Ba0.55K0.45)Fe2As2 single crystals
• Upper critical fields well above 100 T for the superconductor SmFeAsO${}_{0.85}$F${}_{0.15}$ with T${}_c$ = 46 K
• Evidence for two distinct scales of current flow in polycrystalline Sm and Nd iron oxypnictides
• Superconductivity in Epitaxial Thin Films of Co-Doped SrFe2As2 with Bilayered FeAs Structures and their Magnetic Anisotropy
• Electromagnetic, atomic-structure and chemistry changes induced by Ca-doping of low-angle $YB{a}_{2}C{u}_3{O}_{7-\delta }$ grain boundaries
• Intergrain current flow in a randomly oriented polycrystalline SmFeAsO0.85 oxypnictide
• Intrinsic magnetic properties of NdFeAsO${}_{0.9}$F${}_{0.1}$ superconductor from local and global measurements

Cited by in corpus (62)

• Superconductivity in Iron Compounds
• Recent advances in iron-based superconductors toward applications
• Exploration of new superconductors and functional materials and fabrication of superconducting tapes and wires of iron pnictides
• Advantageous grain boundaries in iron pnictide superconductors
• High intergrain critical current density in fine-grain (Ba0.6K0.4)Fe2As2 wires and bulks
• Template engineering of Co-doped BaFe2As2 single-crystal thin films
• Progress in wire fabrication of iron-based superconductors
• The behavior of grain boundaries in the Fe-based superconductors
• What limits supercurrents in high temperature superconductors? A microscopic model of cuprate grain boundaries
• To use or not to use cool superconductors?
• Biaxially textured cobalt-doped BaFe2As2 films with high critical current density over 1 MA/cm2 on MgO-buffered metal-tape flexible substrates
• Iron-chalcogenide FeSe${}_{0.5}$Te${}_{0.5}$ coated superconducting tapes for high field applications
• High Critical Current Density 4 MA/cm2 in Co-Doped BaFe2As2 Epitaxial Films Grown on (La, Sr)(Al, Ta)O3 Substrates without Buffer Layers
• Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical IBAD-MgO Substrates
• Artificially engineered superlattices of pnictide superconductor
• Scaling behaviour of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films
• Strong vortex pinning in Co-doped BaFe2As2 single crystal thin films
• Josephson junction in cobalt-doped BaFe2As2 epitaxial thin films on (La, Sr)(Al, Ta)O3 bicrystal substrates
• High transport critical current densities in textured Fe-sheathed Sr1-xKxFe2As2+Sn superconducting tapes
• Fe-based superconducting thin films on metallic substrates: growth, characteristics and relevant properties
• A new approach for improving global critical current density in Fe(Se0.5Te0.5) polycrystalline materials
• Demonstration of an iron-pnictide bulk superconducting magnet capable of trapping over 1 T
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers
• DC superconducting quantum interference devices fabricated using bicrystal grain boundary junctions in Co-doped BaFe2As2 epitaxial films
• Mechanochemical synthesis of pnictide compounds and superconducting Ba0.6K0.4Fe2As2 bulks with high critical current density
• Influenced of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers
• Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2
• Grain boundary characteristics of Fe-based superconductors
• Versatile fluoride substrates for Fe-based superconducting thin films
• Grain-boundary structure and segregation in Nb3Sn coatings on Nb for high-performance superconducting radiofrequency cavity applications
• Artificial and self-assembled pinning centers in Ba(Fe1-xCox)2As2 thin films as a route to very high current density
• Low-temperature synthesis of SmFeAsO0.7F0.3 wires with high transport critical current density
• Evidence for electromagnetic granularity in polycrystalline Sm1111 iron-pnictides with enhanced phase purity
• Superconducting properties and magneto-optical imaging of Ba0.6K0.4Fe2As2 PIT wires with Ag addition
• Fabrication and transport properties of Sr0.6K0.4Fe2As2 multifilamentary superconducting wires
• High-field transport properties of a P-doped BaFe2As2 film on technical substrate
• Low-temperature Synthesis of FeTe0.5Se0.5 Polycrystals with a High Transport Critical Current Density
• Enhanced critical-current in P-doped BaFe2As2 thin films on metal substrates arising from poorly aligned grain boundaries
• Unusually high critical current of clean P-doped BaFe2As2 single crystalline thin film
• Origin of Weak-Link Behavior of Grain Boundaries in Superconducting Cuprates and Pnictides
• C-axis critical current of a PrFeAsO0.7 single crystal
• Electronic phase diagram of disordered Co doped BaFe2As2
• Vortex pinning and dynamics in high performance Sr0.6K0.4Fe2As2 superconductor
• Enhanced upper critical field in Co-doped Ba122 superconductors by lattice defect tuning
• Improved transport critical currents in Ag and Pb co-doped BaxK1-xFe2As2 superconducting tapes
• Jc Scaling and Anisotropies in Co-doped Ba-122 thin films
• Disorder effects and current percolation in FeAs based superconductors
• Transport and magnetic properties of Co-doped BaFe_{2}As_{2} epitaxial thin films
• Bicrystalline Grain Boundary and Hybrid SNS Junctions Based on Ba-122 Thin Films
• Lessons from Oxypnictide Thin Films
• Investigation of TiO${}_x$ barriers for their use in hybrid Josephson and tunnelling junctions based on Ba-122 thin films
• Peculiar Phase Diagram with Isolated Superconducting Regions in ThFeAsN${}_{1-x}$O${}_x$
• Quantum Waveguide Theory of the Josephson effect in Multiband Superconductors
• Thermal response of the iron-based Ba122 superconductor to in situ and ex situ processes
• K-doped Ba122 epitaxial thin film on MgO substrate by buffer engineering
• Realization of epitaxial thin films of the superconductor K-doped BaFe${}_{\text{2}}$As${}_{\text{2}}$
• BaFe2As2/Fe bilayers with [001]-tilt grain boundary on MgO and SrTiO3 bicrystal substrates
• Pressure effects on the superconducting thin film Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Surface-phase superconductivity in Mg-deficient V-doped MgTi${}_2$O${}_4$ spinel
• Observation of Uniform Supercurrent Flow in Polycrystalline K-doped Ba122 by Combined Magneto-optical Imaging and Finite-element Modeling
• Calculation of the transport critical current density of c-axis textured 122 iron-based superconductors