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Infrared and Electronic Spectra of Rare Earth Perovskites: Ortho-Chromites, -Manganites and -Ferrites

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Abstract:

The electronic and ir spectra of rare-earth perovskites of the general formula LnZO3, where Ln is the rare earth ion or yttrium and Z is Cr, Mn, or Fe, have been studied in detail. The results have been discussed in terms of crystallography, magnetic properties, covalency of Ln–O and Z–O bonds, and Goodenough's one electron energy diagrams. In all these compounds the rare earth ions do not markedly affect the electronic transitions of the transition metal ions; the 3d electrons clearly exhibit localized behavior. Both the electronic and ir spectra of the LnZO3 perovskites are comparable to the spectra of the corresponding transition metal sesquioxides, Z2O3.

Keywords: Electronic spectra; Infrared spectra; Rare earth perovskites; Semiconductors

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370270774371426

Affiliations: 1: Department of Chemistry, Indian Institute of Technology, Kanpur, Kanpur-16, India 2: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439

Publication date: July 1, 1970

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