High local disorder in Tb2Hf2O7 pyrochlore oxide nanocrystals

The process of Tb2Hf2O7 nanocrystals formation upon annealing to 1600°C was investigated by means of X-ray absorption fine structure (XAFS) spectroscopy combined with X-ray diffraction (XRD) and pair distribution function (PDF) analysis. The structure ordering and the growth of nanocrystals upon ann...

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Bibliographic Details
Main Authors: Kabanova, V A, Popov, V V, Zubavichus, Ya V, Kulik, E S, Yaroslavtsev, A A, Chernikov, R V, Menushenkov, A P
Format: Conference Proceeding
Language:English
Subjects:
Annealing
Distribution functions
Fine structure
Nanocrystals
Physics
X ray absorption
X-ray diffraction
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Summary:The process of Tb2Hf2O7 nanocrystals formation upon annealing to 1600°C was investigated by means of X-ray absorption fine structure (XAFS) spectroscopy combined with X-ray diffraction (XRD) and pair distribution function (PDF) analysis. The structure ordering and the growth of nanocrystals upon annealing were estimated independently from XRD patterns and PDF. The probable content of Tb4+ ions in Tb2Hf2O7 was estimated from XANES. All studies indicate a high disorder and a large number of local structure defects in Tb2Hf2O7 pyrochlore oxide.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/712/1/012113