Effects of different sintering temperatures on microstructural, transport, and magnetic properties of La0.93Sb0.07MnO3 compound

Abstract

Polycrystalline La 0.93 Sb 0.07 MnO 3 ceramics were synthesized using solid-state reaction method. The samples were sintered at different temperatures ranging from 1100°C to 1200°C. It is observed that microstructural, transport and magnetic properties of La 0.93 Sb 0.07 MnO 3 compounds strongly depend on sintering temperatures (TS). With TS increasing, the degree of lattice distortion has been weakened, the grain size has become larger and grain boundaries have decreased. Furthermore, the resistivity was reduced, and metal–insulator transition temperature was enhanced; the saturation magnetization per unit mass has decreased with TS increasing. These effects of different TS on physical properties can be explained by the structure distortion and grain boundary contributions for La 0.93 Sb 0.07 MnO 3 compounds.