Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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High Resolution TEM Lattice Images of Modulated Structure Due to Zn Vacancy Ordering in $Ba(Zn_{1/3}Ta_{2/3})O_3$ Ceramics

$Ba(Zn_{1/3}Ta_{2/3})O_3$ 세라믹에서 Zn vacancy 규칙화에 의한 변조구조의 고분해능 TEM 영상관찰

  • Lee, Hwack-Joo (New Materials Evaluation Center, Korea Research Institute of Standards and Science Yusung-Ku Taeduk Science Town) ;
  • Ryu, Hyun (New Materials Evaluation Center, Korea Research Institute of Standards and Science Yusung-Ku Taeduk Science Town) ;
  • Choi, Seong-Jin (Division of Materials and Metallurgical Engineering, Korea University) ;
  • Nahm, Sahn (Division of Materials and Metallurgical Engineering, Korea University) ;
  • Byun, Jae-Dong (Division of Materials and Metallurgical Engineering, Korea University)
  • 이확주 (한국표준과학연구원 신소재평가센터) ;
  • 류현 (한국표준과학연구원 신소재평가센터) ;
  • 최성진 (고려대학교 공과대학 재료금속 공학부) ;
  • 남산 (고려대학교 공과대학 재료금속 공학부) ;
  • 변제동 (고려대학교 공과대학 재료금속 공학부)
  • Published : 1998.03.01
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Abstract

Detailed studies of high resolution TEM inages on the modulated structure caused by Zn vacancy ordering along [110] direction in BZT sintered at $1400^{\circ}C$ for 90 hours had revealed that the images which had hexagonal patterns were similar to those obtained from the structure which had no modulation, These images had appeared over the wide ranges from -30 nm to -42 nm in defocus values and from 2 nm to 20 nm in thickness. The computer simulated images showed that the modulation due to Zn vacancy ordering had made a small change in contrast in the interior of hexagonal pattern, which was very difficult to differenciate in experiments. The image which demonstrated the modulated structure very well was the one which obtained at -52 nm in defocus value and 16 nm in thickness.

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