Soft x-ray synchrotron radiation spectroscopy study of [formula omitted] perovskites [formula omitted]

Abstract

The electronic structures of SrMn1-xRuxO3 (0 <= x <= 1) have been investigated by employing soft x-ray absorption spectroscopy (XAS). The measured Mn 2p XAS spectra for SrMn1-xRuxO3 show that the valence states of Mn ions change monotonically from Mn4+ for x=0 to similar to Mn3+ for x=0.8, suggesting that the valence states of the substituted Ru ions are higher than 4+. The Ru 3p XAS spectra of SrMn(1-x)RuxO(3) show the existence of pentavalent Ru5+ ions for the low x value. The measured O 1s XAS spectra also support these findings. (C) 2010 American Institute of Physics. [doi:10.1063/1.3360342]