Targeted A and B site double doping in LaMnO3 perovskites nanoparticles: Tailoring the magnetic behaviour for spintronic applications

•Sr & Ca and Fe & Co double doping pairs in LaMnO3 perovskite for the first time.•A simple and cost-effective solution combustion synthesis is employed.•Achieved tailored magnetic behaviour of LaMnO3 by suitable double doping. This study reports the synthesis and characterization of A-site and B-site doped perovskites nanoparticles La0.8Sr0.1Ca0.1MnO3 and LaMn0.8Fe0.1Co0.1O3 prepared using cost-effective solution combustion synthesis with oxalic acid as fuel. X-ray diffraction profile confirms tetragonal symmetry for both La0.8Sr0.1Ca0.1MnO3 and LaMn0.8Fe0.1Co0.1O3. The FESEM study showed particle agglomeration with average sizes of 75 and 67 nm, attributed to ionic radii differences. Elemental composition was verified through EDX analysis. Magnetic measurements conducted at 5 and 300 K demonstrate that La0.8Sr0.1Ca0.1MnO3 displayed soft magnetic properties with high saturation magnetization (79.81 emu/g) and low coercivity (0.016 T), whereas LaMn0.8Fe0.1Co0.1O3 showed hard magnetic characteristics with increased coercivity (0.38 T) and lower saturation magnetization (51.25 emu/g). Temperature-dependent magnetization studies showed ferromagnetic to paramagnetic transitions for both materials, suggesting that targeted doping at A- and B-sites enhances magnetic performance. The findings suggest the materials’ potential applications in spintronic devices such as magnetic storage and sensors.