Effects of Te- and Fe-doping on the superconducting properties in Fe_ySe_1-xTe_x thin films.

ABSTRACT: High quality Fe_ySe_1-xTe_x epitaxial thin films have been fabricated on TiO₂-buffered SrTiO₃ substrates by pulsed laser deposition technology. There is a significant composition deviation between the nominal target and the thin film. Te doping can affect the Se/Te ratio and Fe content in chemical composition. The superconducting transition temperature T_c is closely related to the chemical composition. Fe vacancies are beneficial for the Fe_ySe_1-xTe_x films to exhibit the higher T_c. A 3D phase diagram is given that the optimize range is x = 0.13-0.15 and y = 0.73-0.78 for Fe_ySe_1-xTe_x films. The anisotropic, effective pining energy, and critical current d

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC8748920 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature