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Direct Determination of Dopant Site Selectivity in Ordered Perovskite CaCu 3 Ti 4 O 12 Polycrystals by Aberration‐Corrected STEM
Author(s) -
Choi SiYoung,
Chung SungYoon,
Yamamoto Takahisa,
Ikuhara Yuichi
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200802728
Subject(s) - dopant , perovskite (structure) , materials science , content (measure theory) , crystallography , mineralogy , analytical chemistry (journal) , doping , optoelectronics , chemistry , organic chemistry , mathematics , mathematical analysis
Through a combination of aberration‐corrected HAADF‐STEM and the EELS at the atomic level, it is found that added La in CaCu 3 Ti 4 O 12 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.