The nano-crystalline La0.1Bi0.9FeO3 compound was successfully synthesized by starch-based combustion method. The crystal structure and magnetic behavior were studied by temperature-dependent X-ray diffraction (XRD), scanning electron micros-copy (SEM), differential scanning calorimetry (DSC) andmagnetic measurements. The La0.1Bi0.9FeO3 compounds crystallized in a rhombohedrally distorted perovskite structure with space groupR3c. The substitution of La for Bi reduced the rhombohedral distor-tion. The structural phase transitions in La0.1Bi0.9FeO3 driven by temperature showed that the extraordinary two-phase coexistence state of BiFeO3 and LaFeO3 was observed in a narrow temperature range of 630–700 oC. The magnetization of the La0.1Bi0.9FeO3 sample was improved by heat treatment in the temperature range. When the heat treatment temperatures rose from 25 to 600 oC, the remanence (Mr) and coercivity (Hc) of the La0.1Bi0.9FeO3 compound almost remained the same, and increased rapidly to 0.134 emu/g and 7.1 KOe on further increasing the heat treatment temperature to 650 oC.
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