Evidence for an anomalous redox ionic pair between Ru and Mn in SrRu0.5Mn0.5O3: An X-ray absorption spectroscopy approach

Literature Information

Publication Date 2002-11-19
DOI 10.1039/B209293J
Impact Factor 6.222
Authors

S. Sundar Manoharan, Ranjan K. Sahu


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Abstract

X-ray absorption spectroscopy studies of the polycrystalline SrRu0.5Mn0.5O3 have been performed at Ru, Mn-L2,3 edges. The 2p → t2g related peak at the Ru-L2 edge is more intense than the Ru-L3 edge and a shift of the 2p → eg related peak by ∼0.8 eV to higher energy than that of the Ru(IV) compound, SrRuO3 is observed. In combination with a crystal field multiplet calculation approach, a possible anomalous change in the spectral features is explained based on the existence of a redox ionic pair involving Ru(IV)/Ru(V) ↔ Mn(III)/Mn(IV).

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