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Kim, Sangwook
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Publications (4/4 displayed)
- 2023Crystal structure of heteroepitaxial BaTiO3–KNbO3 core–shell nanocomposite particles studied by synchrotron radiation X-ray diffractioncitations
- 2023Stability of ferroelectric phase and structural characteristics in oriented PbTiO<sub>3</sub> ceramic coating formed by aerosol deposition methodcitations
- 2023Lattice strain visualization inside a 400 nm single grain of BaTiO3 in polycrystalline ceramics by Bragg coherent X-ray diffraction imagingcitations
- 2020Piezoelectricity in perovskite-type pseudo-cubic ferroelectrics by partial ordering of off-centered cationscitations
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article
Lattice strain visualization inside a 400 nm single grain of BaTiO3 in polycrystalline ceramics by Bragg coherent X-ray diffraction imaging
Abstract
<jats:title>Abstract</jats:title><jats:p>The degree of anisotropy and the domain arrangement of crystal structures in ferroelectrics are affected by the grain boundaries and by the shape and size of the grains. To understand the grain boundary effects that occur in ferroelectric ceramics, we introduce a technique for nondestructively observing the internal lattice strain distribution of a submicrometer-sized ferroelectric grain in polycrystalline materials. The ferroelectric phase transition of a single grain in the polycrystalline materials was evaluated by tracking the changes in the Bragg coherent X-ray diffraction (CXD) patterns. The internal lattice strain distribution of the grains in the paraelectric phase was visualized via Bragg CXD imaging. A pair of 90° domains in the ferroelectric phase were also imaged in three dimensions, and showed a domain boundary correlated with the internal lattice strain caused by the stresses from the adjacent grains.</jats:p>