EXAFS study of LaMn1-xCoxO3 compounds

Abstract: A systematic study of cobalt environment in the perovskite series by means of X-ray absorption spectroscopy in the EXAFS range is reported. The spectra were measured at the edge of Co on powder samples at room temperature and analysed using multiple scattering paths calculated with the FEFF8 computer program. The next neighbor oxygen shell of cobalt shows a decrease of the distance from the central ion with increasing Co doping. This corresponds to an increased oxidation level of 3d ions. An information on the distortion of the oxygen octahedra and the Debye–Waller factor is discussed. [Copyright &y& Elsevier]