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High‐Resolution Transmission Electron Microscopy Observations on Antiphase Boundaries in Barium Lanthanum Magnesium Niobate
Author(s) -
Lee Hwack Joo,
Park Hyun Min,
Song Yong Won,
Cho Yang Koo,
Nahm Sahn
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00936.x
Subject(s) - lanthanum , transmission electron microscopy , barium , materials science , magnesium , electron microscope , crystallography , perovskite (structure) , mineralogy , chemistry , optics , inorganic chemistry , metallurgy , nanotechnology , physics
Atomic structural observations on the antiphase boundaries (APBs) in the complex barium lanthanum magnesium niobate perovskite compound Ba 0.7 La 0.3 (Mg 0.43 Nb 0.57 )O 3 (BLMN), which has a 1:1 chemical ordering of B‐site cations, were conducted using high‐resolution transmission electron microscopy. Using APB contrast, the curved APB was determined to have a ledged structure, with a terrace that was composed of the (111) plane at an atomic level. In APBs with finite widths, microfacets on the (111) planes also were observed.