Abstract
Abstract Magnetic and structural properties have been investigated in La(Cr,Fe,Mn)O3 nanoparticles obtained by co-precipitation method. The X-ray diffraction measurements allied to Rietveld method confirm the formation of LaCrO3, LaFeO3 and LaMnO3 nanoparticles with crystal structure orthorhombic (Pbnm), orthorhombic (Pnma) and rhombohedral (R-3c), respectively. We also verified an decreasing in the average crystallite size from 73 to 26 nm, depending of the transition metal. The magnetic measurements reveal an antiferromagnetic behavior for the LaCrO3 sample with TN~289 K, and a weak ferromagnetic ordering for the LaMnO3 sample with Tc~200 K.
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