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Evolution of Mn and Co oxidation state on TbMn1-xCoxO3 compounds

AutorCuartero, Vera; Blasco, Javier; García, Joaquín; Lafuerza, Sara; Subías, G.
Fecha de publicación2013
EditorInstitute of Physics Publishing
CitaciónJournal of Physics: Conference Series 430(1): 012102 (2013)
ResumenStructural and electronic properties of TbMn1-xCoxO3 samples have been characterized by means of x-ray and neutron diffraction and x-ray absorption spectroscopic techniques. Crystallographic structure was refined from diffraction data, and samples show the orthorhombic distorted perovskite structure (Pbnm), being isostructural to TbMnO3, except for x=0.4, 0.5 and 0.6, where an ordered double perovskite structure (P21/n) is found. The electronic configuration of Mn and Co ions was obtained along the series from the chemical shift of the edge on x-ray absorption spectra, at the Mn and Co K-edges. Our results agree with a charge redistribution between Mn and Co ions, yielding a mixed valence state Mn3+/Mn4+ and Co3+/Co2+ for the whole series.
DescripciónTrabajo presentado a la 15th International Conference on X-ray Absorption Fine Structure (XAFS15) celebrada del 22 al 28 de julio de 2012 en Pekín (China).-- Under the terms of the Creative Commons Attribution (CC BY) licence (creativecommons.org/licenses/by/3.0).
Versión del editorhttp://dx.doi.org/10.1088/1742-6596/430/1/012102
Identificadoresdoi: 10.1088/1742-6596/430/1/012102
issn: 1742-6588
e-issn: 1742-6596
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