Enhanced In-field Properties in BaFe₂(As_1-xP_x)₂ Thin Films with BaZrO₃ Nanoparticles

Abstract

This paper reviews our study on in-field superconducting properties and thermally activated vortex motion (creep) in BaFe₂(As_1-xP_x)₂ (Ba122:P) thin films with BaZrO₃ nanoparticles fabricated on a MgO single crystal using pulsed laser deposition (PLD). We demonstrated that introducing controlled uniformly dispersed BaZrO₃ nanoparticles into Ba122:P films significantly improves its in-field superconducting properties without degrading crystallinity, critical temperature and self-field critical current density (J_c). The nanoparticles doped Ba122:P films show an increase in J_c at all magnetic-field orientations and significantly reduced vortex creep, indicating that nanocomposite films could be a promising candidate for in-field applications.