The ferroelectric and fatigue behaviors of Dy doped BiFeO_3 thin films prepared by chemistry solution deposition

摘要

Single-phase multiferroic BiFeO_3 and rare-earth metal of dysprosium (Dy) doped BiFeO_3 thin films were prepared by chemistry solution deposition. The structure and electrical properties of the BiFeO_3 thin films were characterized and investigated. It shows that improved ferroelectric polarization, fatigue endurance and leakage current were obtained. Thus enhanced performance are attributed to the lattice distortion happened along with the structure transformation from the rhombohedral structures toward the coexistence of tetragonal and orthorhom-bic symmetry structures and the decreased oxygen vacancies after doping Dy. The present work provided an available way on enhancing ferroelectric polarization and fatigue endurance of BiFeO_3 based thin films.