Interfacial Structure of Ordered Domains in Barium Lanthanum Magnesium Niobate |
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| Authors: | Hwack Joo Lee Hyun Ryu Hyun Min Park Jong Hoo Paik Sahn Nahm Jae-Dong Byun |
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| Affiliation: | New Materials Evaluation Center, Korea Research Institute of Standards and Science, Taeduk Science Town, Taejon 305–600, Korea;Division of Materials and Metallurgical Engineering, Korea University, Seoul 136–701, Korea |
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| Abstract: | Microstructural studies on the interfacial boundaries of 1:1 and 1:2 ordered domains in (Ba0.9La0.1)(Mg0.37Nb0.63)O3 were conducted using high-resolution transmission electron microscopy and X-ray diffractometry. Both 1:2 and 1:1 ordered domains coexisted in a fully ordered single grain. Each ordered domain occupied its own region, and the interfaces were atomically sharp and coherent. The wavelength of the superlattice modulation was ∼0.47 nm in the 1:1 ordered domain and ∼0.71 nm in the 1:2 ordered domain. The transition from the 1:2 ordered region to the 1:1 ordered region was clearly shown at the interface. These observations well support the structural models that have been previously presented. |
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