Direct Determination of Dopant Site Selectivity in Ordered Perovskite CaCu₃Ti₄O₁₂ Polycrystals by Aberration‐Corrected STEM

Through a combination of aberration-corrected HAADF-STEM and the EELS at the atomic level, it is found that added La in CaCu3Ti4O12 is selectively substituted for Ca, rather than Cu. The present study suggests that imaging based on STEM combined with EELS can be utilized as a powerful tool that reveals the atomic-level distribution of cation dopants in complex oxides. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.