Abstract
We investigate the electronic structures of hole-doped, La0.7Ca0.3MnO3, and electrondoped, La0.7Ce0.3MnO3, manganites by x-ray absorption near edge structure (XANES) spectroscopy at the O and Mn K-edges. While, the O K-edge XANES results indicate that Ca and Ce doping induce holes in O 2p derived states, the Mn K-edge XANES do not give any evidence for creation of the Mn4+ (or Mn2+) ions by Ca (or Ce) dopants. Such results further questions the validity of double exchange mechanism in understanding the anomalous properties of manganites.
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Asokan, K. et al. (2005). Electron- and Hole-Doping Effects in Manganites Studied by X-Ray Absorption Spectroscopy. In: Somayajulu, D.R.S., Lieb, K.P. (eds) IWNMS 2004. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-29194-6_15
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DOI: https://doi.org/10.1007/3-540-29194-6_15
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