Oxidation state and chemical shift investigation in transition metal oxides by EELS

Haiyan Tan, Jo Verbeeck, Artem Abakumov, Gustaaf Van Tendeloo

Research output: Contribution to journalArticlepeer-review

351 Citations (Scopus)

Abstract

Transition metal L 2,3 electron energy-loss spectra for a wide range of V-, Mn- and Fe-based oxides were recorded and carefully analyzed for their correlation with the formal oxidation states of the transition metal ions. Special attention is paid to obtain an accurate energy scale which provides absolute energy positions for all core-loss edges. The white-line ratio method, chemical shift method, ELNES fitting method, two-parameter method and other methods are compared and their validity is discussed. Both the ELNES fitting method and the chemical shift method have the advantage of a wide application range and good consistency but require special attention to accurately measure the core-loss edge position. The obtained conclusions are of fundamental importance, e.g., for obtaining atomic resolution oxidation state information in modern experiments.

Original languageEnglish
Pages (from-to)24-33
Number of pages10
JournalUltramicroscopy
Volume116
DOIs
Publication statusPublished - May 2012
Externally publishedYes

Keywords

  • Chemical shift
  • Electron energy-loss spectroscopy
  • Oxidation state
  • Transition metal

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