In order to clarify changes in the electronic structures, especially Fe partial density of states (DOS), of Li2Fe1-xMnxP2O7 with Mn substitution, we have performed x-ray absorption spectroscopy and resonant photoemission spectroscopy (RPES) experiments for Li2Fe1-xMnxP2O7. Using RPES teqniques, we have succeeded in extracting the Fe2+ partial DOS. We have found the systematic shift to higher binding energy and broadening of Fe 3d t2g down-spin states accompanying with the Mn substitution. The peak shift of the Fe 3d t2g down-spin states is matched very well to the change of Fe3+/Fe 2+ redox potential, suggesting that the origin of high Fe 3+/Fe2+ redox potential in Li2Fe1-xMnxP2O7 is the shift of the Fe 3d t2g down-spin states to the higher binding energy with Mn substitution.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2014|
|Event||1st Conference on Light and Particle Beams in Materials Science 2013, LPBMS 2013 - Tsukuba, Japan|
Duration: 2013 Aug 29 → 2013 Aug 31
ASJC Scopus subject areas
- Physics and Astronomy(all)