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Nano-sized domains have been widely observed in rare-earth-doped ceria, but their structure model remains unclear. In this work, based on the study of high resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) of Gd-doped ceria, the structure model of the domains was constructed by a combination of defect clusters with oxygen vacancy chains. Then, the SAED...
Nano-sized domains were studied systematically in 10–30 at.% Gd-doped ceria. By using energy filtering transmission electron microscopy, it was observed that Gd cations could segregate in the domains. Due to the requirement of electrical neutrality, oxygen vacancies may also segregate into the domains with the dopant cations. Through study of electron energy loss spectroscopy, the local ordering of...
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