Magnetism and electronic properties of BiFeO3 under lower pressure

Abstract

Ab initio calculations show an antiferromagnetic-ferromagnetic phase transition around 9-10 GPa and a magnetic anomaly at 12 GPa in BiFeO3. The magnetic phase transition also involves a structural and insulator-metal transition. The G-type AFM configuration under pressure leads to an increase of the y component and decrease of the z component of the magnetization, which is caused by the splitting of the dz2 orbital from doubly degenerate eg states. Our results agree with recent experimental results.

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• The reversal of magnetization driven by the Dzyaloshinskii-Moriya interaction(DMI) in perovskite Bi2FeMnO6
• Spin transfer in ultrathin BiFeO3 film under external electric field
• Magnetic spiral order in the square-lattice spin system (CuBr)Sr${}_2$Nb${}_3$O${}_{10}$