Enhanced critical-current in P-doped BaFe₂As₂ thin films on metal substrates arising from poorly aligned grain boundaries.

ABSTRACT: Thin films of the iron-based superconductor BaFe₂(As_1-xP_x)₂ (Ba122:P) were fabricated on polycrystalline metal-tape substrates with two kinds of in-plane grain boundary alignments (well aligned (4°) and poorly aligned (8°)) by pulsed laser deposition. The poorly aligned substrate is not applicable to cuprate-coated conductors because the in-plane alignment >4° results in exponential decay of the critical current density (J_c). The Ba122:P film exhibited higher J_c at 4 K when grown on the poorly aligned substrate than on the well-aligned substrate even though the crystallinity was poorer. It was revealed that the misorientation angles of the poorly aligned samples were less than 6°, which are less than the critical angle of an

SUBMITTER: Sato H 

PROVIDER: S-EPMC5104974 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature