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This work presents the synthesis of rhombohedral LaMnO3 nanoparticles (NPs) by using a sol–gel method with the assistance of polyvinyl alcohol (PVA), followed with annealing at 700°C for 2 h in air. By changing the PVA amount from 0 ml to 15 ml, we have synthesized LaMnO3 NPs so that their ferromagnetic–paramagnetic phase-transition temperature (TC) can be tuned in the range between 228 K and 305 K...
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