Exceptional Layered Ordering of Cobalt and Iron in Perovskites

A study is conducted to demonstrate exceptional layered ordering of cobalt and iron in perovskites. This exceptional type of cationic ordering suggests that the oxygen stoichiometry may play a role in its stabilization, resulting from the alternate stacking of double perovskite slices YBaCo2O5 and t...

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Bibliographic Details
Published inChemistry of materials Vol. 28; no. 9; pp. 2907 - 2911
Main Authors Lebedev, Oleg I, Turner, Stuart, Caignaert, Vincent, Cherepanov, Vladimir A, Raveau, Bernard
Format Journal Article
LanguageEnglish
Published American Chemical Society 10.05.2016
Subjects
Chemical Sciences
Cristallography
Material chemistry
or physical chemistry
Theoretical and
Bright fields
Oxygen vacancies
Oxygen
Chemical structure
Triple perovskite
Oxides
Perovskites
Cobalt
Perovskite
Oxygen stoichiometry
Layered ordering
Double perovskites
Layers
Cationic ordering
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Summary:A study is conducted to demonstrate exceptional layered ordering of cobalt and iron in perovskites. This exceptional type of cationic ordering suggests that the oxygen stoichiometry may play a role in its stabilization, resulting from the alternate stacking of double perovskite slices YBaCo2O5 and triple perovskite slices with the ideal composition YBa2Fe3O8. Annular bright field STEM (ABF-STEM) imaging has been carried out to understand the distribution of oxygen vacancies in the structure.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.6b01046