Effect of octahedron tilt on structure and magnetic properties of bismuth ferrite

Abstract Multiferroic trivalent ions doped BiFeO3 ceramics were synthesized using the rapid liquid state method. The trivalent ions (Sm3+, Gd3+, Y3+) doping causes structural distortion without changing the rhombohedral structure. Raman analysis shows that the effect of doping on E modes is greater than A1 modes, and FeO6 octahedron is regulated by ions doping. M-H hysteresis loops show A-site trivalent ions doped samples exhibit improved magnetism compared with pure BiFeO3 since the suppressed spiral spin structure. Doped samples exhibited natural resonance around 16~17 GHz due to the changes in dielectric loss caused by the tilt of the FeO6 octahedron.