Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Crystal structure of $Ba(Mg_{1/3}Nb_{2/3})O_3$ - $La(Mg_{2/3}Nb_{1/3})O_3$ Complex perovskite compound

$Ba(Mg_{1/3}Nb_{2/3})O_3$ - $La(Mg_{2/3}Nb_{1/3})O_3$ 복합 페로브스카이트 화합물의 결정구조

  • Published : 2003.11.13
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Abstract

Crystal structure of $(Ba_{1-x}La_x)[Mg_{(1+x)/3}Nb_{(2-x)/3}]O_3$ (BLMN) ceramics with $0{\leq}x{\leq}1$ was investigated using synchrotron X-ray powder diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When La content, x, is above 0.1, the 1:2 ordered hexagonal structure found in $Ba(Mg_{1/3}Nb_{2/3})O_3$ (BMN) was transformed into 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x=0.7. However, when x exceeded 0.7, BLMN was transformed 1:1 ordered structure which has cation displacement and in-phase and anti-phase tilt of octahedra.

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