1. Novel synthetic approach to the preparation of single-phase BixLa1−xMnO3+δ solid solutions
- Author
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Wieslaw Strek, Aivaras Kareiva, Aleksej Zarkov, Anna Lukowiak, Dovydas Karoblis, Dalis Baltrunas, and Kestutis Mazeika
- Subjects
Thermogravimetric analysis ,Sol-gel processing ,Materials science ,Rietveld refinement ,Scanning electron microscope ,Analytical chemistry ,Bismuth manganite ,02 engineering and technology ,General Chemistry ,Crystal structure ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Paramagnetic ,Biomaterials ,Magnetization ,Differential scanning calorimetry ,Materials Chemistry ,Ceramics and Composites ,0210 nano-technology ,Spectroscopy ,Solid solution - Abstract
In this study, the BixLa1−xMnO3+δsolid solutions (xfrom 0 to 0.65) were synthesized using sol–gel combustion method with citric acid as a fuel and complexing agent. It was shown that changes in chemical composition of the materials lead to the evolution of crystal structure, morphology, and magnetic properties. The thermal behavior of precursor gel was investigated by thermogravimetric and differential scanning calorimetry (TG-DSC) measurements. X-ray diffraction (XRD) analysis demonstrated that all samples were monophasic. The Rietveld analysis showed that the structure can be indexed by trigonal or cubic unit cell depending on Bi3+content. Scanning electron microscopy (SEM) was used to evaluate morphological features of the synthesized materials and revealed that Bi3+ions significantly promote growth of the grains. The sol–gel-derived BixLa1−xMnO3+δspecimens were also characterized by FT-IR spectroscopy and magnetization measurements, which showed a clear correlation between magnetic properties and crystal structure of the materials.
- Published
- 2019
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