Vladimir Matias

Biaxially textured cobalt-doped BaFe2As2 films with high critical current density over 1 MA/cm2 on MgO-buffered metal-tape flexible substrates

High critical current densities (Jc)>1 MA/cm2 were realized in cobalt-doped BaFe2As2 (BaFe2As2:Co) films on flexible metal substrates with biaxially textured MgO base-layers fabricated by an ion-beam assisted deposition technique. The BaFe2As2:Co films showed small in-plane crystalline misorientations (ΔϕBaFe2As2:Co) of ∼3° regardless of twice larger misorientations of the MgO base-layers (ΔϕMgO=7.3°), and exhibited high self-field Jc up to 3.5 MA/cm2 at 2 K. These values are comparable to that on MgO single crystals and the highest Jc among iron pnictide superconducting tapes and wires ever reported. High in-field Jc suggests the existence of c-axis correlated vortex pinning centers.

Iron-chalcogenide FeSe0.5Te0.5 coated superconducting tapes for high field applications

The high upper critical field characteristic of the recently discovered iron-based superconducting chalcogenides opens the possibility of developing a new type of non-oxide high-field superconducting wires. In this work, we utilize a buffered metal template on which we grow a textured FeSe

Solution deposition planarization of long-length flexible substrates

_{0.5}

Reel-to-reel preparation of ion-beam assisted deposition (IBAD)-MgO based coated conductors

Te

Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical Ion Beam Assisted Deposition MgO Substrates

_{0.5}

Very fast biaxial texture evolution using high rate ion-beam-assisted deposition of MgO

layer, an approach developed originally for high temperature superconducting coated conductors. These tapes carry high critical current densities (>1

Continuous electropolishing of Hastelloy substrates for ion-beam assisted deposition of MgO

\times10^{4}

Accelerated coated conductor program at Los Alamos National Laboratory

A/cm

Continuous fabrication of IBAD-MgO based coated conductors

^{2}

Architecture, microstructure and Jc anisotropy of highly oriented biaxially textured Co-doped BaFe2As2 on Fe/IBAD-MgO-buffered metal tapes

) at about 4.2K under magnetic field as high as 25 T, which are nearly isotropic to the field direction. This demonstrates a very promising future for iron chalcogenides for high field applications at liquid helium temperatures. Flux pinning force analysis indicates a point defect pinning mechanism, creating prospects for a straightforward approach to conductor optimization.