Novel behaviors of single-crystalline BiFeO3 nanorods hydrothermally synthesized under magnetic field

Abstract

Single-crystalline BiFeO₃ nanorods have been prepared with a hydrothermal method under magnetic fields. The nanorods exhibit enhanced magnetization in comparison with the microcubes synthesized without the magnetic field. The nanorods display anomalous Raman behaviors, i.e., frequency shift of E-1, A₁-1 and A₁-2 modes and an enhanced intensity of the A₁-2 mode, meaning there is magnetic anisotropy in the BiFeO₃ lattice. The enhanced magnetization and anomalous Raman change are mainly attributed to the modulated spin structure from the distorted lattice caused by the magnetic field.