Synthesis and characterization of La(Cr,Fe,Mn)O sub(3) nanoparticles obtained by co-precipitation method

Magnetic and structural properties have been investigated in La(Cr,Fe,Mn)O sub(3) nanoparticles obtained by co-precipitation method. The X-ray diffraction measurements allied to Rietveld method confirm the formation of LaCrO sub(3), LaFeO sub(3) and LaMnO sub(3) nanoparticles with crystal structure...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2015-04, Vol.379, p.80-93
Main Authors: Fabian, F A, Pedra, P P, Filho, J LS, Duque, J GS, Meneses, C T
Format: Article
Language:English
Subjects:
Coprecipitation
Crystal structure
Crystallites
Diffraction
Ferromagnetism
Magnetic properties
Nanoparticles
Rietveld method
Transition metals
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Summary:Magnetic and structural properties have been investigated in La(Cr,Fe,Mn)O sub(3) nanoparticles obtained by co-precipitation method. The X-ray diffraction measurements allied to Rietveld method confirm the formation of LaCrO sub(3), LaFeO sub(3) and LaMnO sub(3) nanoparticles with crystal structure orthorhombic (Pbrim), 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 LaCrO sub(3) sample with T sub(N)~289 K, and a weak ferromagnetic ordering for the LaMnO sub(3) sample with T sub(c)~200 K.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2014.12.004