Abstract
AbstractPure phase NiTiO3was obtained via a modified sol-gel method. Addition of CeO2in a modified oxidizing atmosphere in stearic acid at 750 °C led to the growth of several nanoscaled Ce-rich phases. The formation of NiTiO3and CeO2/NiTiO3was strongly confirmed based on metal-oxygen and metal-metal absorption bands. The nanometric formation of crystals and narrow distribution of nanoparticles were confirmed by XRD and FE-SEM. The magnetic properties indicated weak ferromagnetic behavior of NiTiO3and paramagnetic behavior of CeO2/NiTiO3nanocomposites. The paramagnetic properties were improved gradually into superparamagnetic upon increasing CeO2domain to 30 mol%. It was observed that the current density can achieve 1 × 10-9A/cm2for the sample containing 30 mol% CeO2at an electrical field equal to 40 V/cm.
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