Mossbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

The synthesis of REFe0.5Cr0.5O3 (RE = La, Y) using the sol-gel method is focused and their structural differences are investigated. The results of X-ray diffraction show that the change of ion radius at position A leads to varying degrees of octahedral distortion and spatial group structure. The scanning electron microscopy analysis reveals micron-level particles with clear boundaries, while energy-dispersive X-ray spectroscopy and room temperature Mossbauer spectra indicate the presence of Fe/Cr clusters in the sample and the transitional valence of iron. Disorder in the B position leads to a saturation moment that is lower than the theoretical value. The thermomagnetic profile shows a reversal of magnetization due to the interaction between the single-ion magnetic anisotropy and the antisymmetric Dzyaloshinskii-Moriya (DM) interaction, with a broader peak is observed due to cluster formation. The difference in negative magnetic field is due to the difference in net magnetic moment caused by different DM intensities.