Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical IBAD-MgO Substrates

TL;DR

This paper demonstrates the successful epitaxial growth of superconducting Ba(Fe1-xCox)2As2 thin films on IBAD-MgO substrates, achieving high critical current densities and showcasing potential for coated conductor applications.

Contribution

It introduces a novel iron buffer architecture enabling epitaxial growth of Ba-122 films on IBAD-MgO substrates, advancing superconductor thin film technology.

Findings

Superconducting transition temperature of 21.5 K.

Critical current density over 10^5 A/cm2 at 8 K.

Potential for coated conductor applications.

Abstract

The biaxially textured growth of superconducting Co-doped BaFe2As2 (Ba-122) thin films has been realized on ion beam assisted deposition (IBAD) MgO coated conductor templates by employing an iron buffer architecture. The iron pnictide coated conductor showed a superconducting transition temperature of 21.5 K, which is slightly lower than that of Co-doped Ba-122 films on single crystalline MgO substrates. A self-field critical current density of over 10^5 A/cm2 has already been achieved even at 8 K. The current experiment highlights the potential of possible coated conductor applications of the iron-based superconductors.