Effects of Pr Substitution on Electrical Properties of Bi(Fe0.95Mn0.05)O3 Thin Films

The effects of Pr3+ substitution on electrical properties of Bi(Fe0.95Mn0.05)O3 (BFMO) thin films are investigated. The leakage current densities of BFMO films can be significantly suppressed by Pr3+ substitution. Dielectric analysis reveals that dielectric constants of the films increase with increasing Pr3+ content. Reduced loss tangents are obtained in Pr3+-substituted BFMO films. Ferroelectric measurements demonstrate that Pr3+ substitution is helpful for lowering the coercive fields of films. In addition, a double hysteresis loop is observed in the BFMO film with 25% Bi3+ substituted by Pr3+. This may be ascribed to the existence of the defect-complexes.