Site-specific mapping of transition metal oxygen coordination in complex oxides

S. Turner, R. Egoavil, M. Batuk, A. A. Abakumov, J. Hadermann, J. Verbeeck, G. Van Tendeloo

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11 Citations (Scopus)

Abstract

We demonstrate site-specific mapping of the oxygen coordination number for transition metals in complex oxides using atomically resolved electron energy-loss spectroscopy in an aberration-corrected scanning transmission electron microscope. Pb2Sr2Bi2Fe 6O16 contains iron with a constant Fe3+ valency in both octahedral and tetragonal pyramidal coordination and is selected to demonstrate the principle of site-specific coordination mapping. Analysis of the site-specific Fe-L2,3 data reveals distinct variations in the fine structure that are attributed to Fe in a six-fold (octahedron) or five-fold (distorted tetragonal pyramid) oxygen coordination. Using these variations, atomic resolution coordination maps are generated that are in excellent agreement with simulations.

Original languageEnglish
Article number241910
JournalApplied Physics Letters
Volume101
Issue number24
DOIs
Publication statusPublished - 10 Dec 2012
Externally publishedYes

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