Magnetic, ferroelectric, and magnetodielectric properties of BiFeO3 ceramic co-doped with Eu and Gd

Abstract Polycrystalline samples of Bi 0.9 Eu 0.1 FeO 3 , Bi 0.9 Gd 0.1 FeO 3 , and Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 ceramics were synthesized by a solid-state reaction method, followed by rapid quenching to room temperature. Bi 0.9 Eu 0.1 FeO 3 shows higher magnetization than Bi 0.9 Gd 0.1 FeO 3 and Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 . This can be explained by lattice distortion, and the change in the statistical distribution of Fe 3+ /Fe 2+ . Similarly, ferroelectric polarization of Bi 0.9 Eu 0.1 FeO 3 was found to be higher than that of Bi 0.9 Gd 0.1 FeO 3 and Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 . However, the absolute value of the magnetocapacitance of Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 (∼1.6%) was found to be higher than that of Bi 0.9 Eu 0.1 FeO 3 (∼1.3%) and Bi 0.9 Gd 0.1 FeO 3 (∼1.1%). In addition, the quadratic component of magnetoelectric coupling is higher for Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 , which makes Bi 0.9 Eu 0.05 Gd 0.05 FeO 3 attractive for further study.