Premium
Interfacial Structure of Disordered‐Ordered Domain Boundaries in Lanthanum‐Doped Barium Magnesium Niobate
Author(s) -
Lee Hwack Joo,
Park Hyun Min,
Ryu Hyun,
Paik Jong Hoo,
Nahm Sahn,
Byun JaeDong
Publication year - 1998
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.1151-2916.1998.tb02779.x
Subject(s) - superlattice , lanthanum , materials science , condensed matter physics , transmission electron microscopy , crystallography , synchrotron , grain boundary , barium , doping , microstructure , optics , chemistry , nanotechnology , physics , inorganic chemistry , metallurgy
Microstructural studies on the interfacial boundaries of disordered and 1:2 ordered domains in lanthanum‐doped (Ba 0.975 La 0.025 )(Mg 0.34 Nb 0.66 )O 3 were performed using high‐resolution transmission electron microscopy and synchrotron powder X‐ray diffractometry. Disordered and 1:2 ordered domains both coexisted in a single grain. Each domain occupied its own region, and the interfaces were atomically sharp and coherent. The wavelength of the superlattice modulation in the 1:2 ordered domain was ∼0.71 nm. The transition from the 1:2 ordered region to the disordered one could be differentiated at the interface by using the superlattice modulations in the 1:2 ordered domain. From these observations, a deducible interfacial model also was presented.