Synthesis, and measurement of structural and magnetic properties, of La_(1-x)Na_xFeO_3(0.0≤x≤0.3) perovskite oxides
来源期刊：JOURNAL OF RARE EARTHS2009年第5期
论文作者：Venkatesan Manivannan Manjunath B. Bellakki Sandeep Kohli Patrick McCurdy
Key words：oxides; combustion synthesis; X-ray diffraction; antiferromagnetic; rare earths;
Abstract: Polycrystalline La_(1-x)Na_xFeO_3 (0.0≤x≤0.3) solid solutions were synthesized by a solution combustion method using glycine as a fuel. The combustion synthesized compounds were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM),diffused reflectance (DR) in the UV-vis, and magnetic measurements. The crystal structure examined by X-ray powder diffraction indicated that the samples were single phase and crystallized in an orthorhombic (space group, Pbnm no.62) structure. The parent and so-dium-substituted compounds showed canted anti-ferromagnetic behavior associated with an increase in magnetic moment as Na content in-creased. The changes in magnetic properties of the materials were correlated to the changes in structural features, as shown by Rietveld structural refinement of the materials.
Venkatesan Manivannan1，Manjunath B. Bellakki1，Sandeep Kohli2，Patrick McCurdy2
(1.Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado, USA;
2.Deparment of Chemistry, Colorado State University, Fort Collins, Colorado, USA)
Abstract:Polycrystalline La_(1-x)Na_xFeO_3 (0.0≤x≤0.3) solid solutions were synthesized by a solution combustion method using glycine as a fuel. The combustion synthesized compounds were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM),diffused reflectance (DR) in the UV-vis, and magnetic measurements. The crystal structure examined by X-ray powder diffraction indicated that the samples were single phase and crystallized in an orthorhombic (space group, Pbnm no.62) structure. The parent and so-dium-substituted compounds showed canted anti-ferromagnetic behavior associated with an increase in magnetic moment as Na content in-creased. The changes in magnetic properties of the materials were correlated to the changes in structural features, as shown by Rietveld structural refinement of the materials.
Key words:oxides; combustion synthesis; X-ray diffraction; antiferromagnetic; rare earths;
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