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D. Turki,Zafar Khan Ghouri,Saeed Al-Meer,Khaled Elsaid,M. I. Ahmad,Ahmed Easa,M. Ellouze,E. K. Hlil 한국자기학회 2017 Journal of Magnetics Vol.22 No.3
The physicochemical properties of La0.8Ca0.2Mn1−xCoxO₃ nanopowders as a function of Co content (x) have been investigated. La0.8Ca0.2Mn1−xCoxO₃ nanopowders were synthesized by sol-gel method and morphologically and structurally well characterized by Scanning electron microscopic (SEM), Infrared spectroscopic (IR) and Raman spectroscopic techniques. IR spectra shows peak at around 600 cm<SUP>−1</SUP> attributed to the stretching mode of MnO6 octahedral and peak at 700 cm<SUP>−1</SUP> assigned to La-Ca-O-Mn bending vibrations. Raman spectra indicate peaks at around 512 and 652 cm<SUP>−1</SUP> related to the Jahn-Teller octahedral distortions. The intensity of these peaks increases with increasing Co doping. The UV-visible spectra were measured in the frequency range of 200-800 nm and two energy gaps were found at 1.63 eV and 3.294 eV for x = 0, 0.1 and 0.3.