In-situ fabrication of cobalt-doped SrFe2As2 thin films by using pulsed laser deposition with excimer laser

TL;DR

This paper demonstrates the successful in-situ growth of high-quality cobalt-doped SrFe2As2 superconducting thin films using pulsed laser deposition with an excimer laser, highlighting their potential for superconducting electronics.

Contribution

It introduces a novel in-situ pulsed laser deposition method with an arsenic-rich target to produce high-quality, c-axis-oriented Fe-based superconductor thin films with bulk superconductivity.

Findings

Strong diamagnetism observed in magnetization measurements

High critical current density with excellent Jc-H performance

Successful fabrication of c-axis-oriented superconducting thin films

Abstract

The remarkably high superconducting transition temperature and upper critical field of iron(Fe)-based layered superconductors, despite ferromagnetic material base, open the prospect for superconducting electronics. However, success in superconducting electronics has been limited because of difficulties in fabricating high-quality thin films. We report the growth of high-quality c-axis-oriented cobalt(Co)-doped SrFe2As2 thin films with bulk superconductivity by using an in-situ pulsed laser deposition technique with a 248-nm-wavelength KrF excimer laser and an arsenic(As)-rich phase target. The temperature and field dependences of the magnetization showing strong diamagnetism and transport critical current density with superior Jc-H performance are reported. These results provide necessary information for practical applications of Fe-based superconductors.