Abstract
Transition metal-doped lanthanum chromites (La0.8Ca0.2)(Cr0.9−x Co0.1Fe x )O3 (x = 0.03, 0.06, 0.09, 0.12) have been synthesized by solid state reaction method. The synthesized samples were characterized for their structural properties using powder x-ray diffraction analysis, which shows that the grown samples are orthorhombic in structure with single phase. The nature of bonding and the charge distribution of the grown samples have been analyzed by maximum entropy method. Further, the samples were characterized for their optical and magnetic properties using ultraviolet–visible spectra and vibrating sample magnetometry. The microstructural studies were carried by scanning electron microscopy/electron dispersive x-ray spectroscopy techniques. From the optical absorption spectra, it was found that the energy band gap of the samples ranges from 2.135 eV to 2.405 eV. From vibrating sample magnetometer measurements, ferromagnetic like behaviour with large coercive field was observed for Fe doping concentration of x = 0.12. Since the doped lanthanum chromites have good mechanical properties and electrical conductivity at high temperature, these materials are used in solid oxide fuel cells.
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Saravanan, R., Thenmozhi, N. & Fu, YP. Preparation and Charge Density in (Co, Fe)-Doped La-Ca-Based Chromite. J. Electron. Mater. 45, 4364–4374 (2016). https://doi.org/10.1007/s11664-016-4610-6
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DOI: https://doi.org/10.1007/s11664-016-4610-6