Effect of La Dopant in Modified Bismuth Ferrite Ceramics

The La modified bismuth ferrite perovskite Bi_0.6La_0.4FeO₃ (BLF) is prepared by cost-effective high solid-solution casting technique. Formation of composite is checked through X-ray diffraction and also notable that there is phase transition from rhombohedral (R3c) to orthorhombic (Pbnm). The average crystalline size (D_SC) and mechanical lattice strain are 63.8 nm and 0.147% respectively as calculated by Williamson-Hall method. The frequency bands corresponding to Bi-O, LaO, and FeO stretching vibration confirm that La⁺³ ions completely incorporate the Bi⁺³ ions in the A-site of the single perovskite. The SEM micrograph suggests that the sample has distinct grains and well-defined grain boundaries and the average grain size (D_SEM) is about 13.9 μm. The rate of agglomeration that acquire in the sample (D_SEM/ D_SC = 219) confirms the excellent connectivity of grains which stands possible reas