Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Measurement of Barium Ion Displacement Near Surface in a Barium Titanate Nanoparticle by Scanning Transmission Electron Microscopy

  • Aoki, Mai (Department of Materials Science and Engineering, Kyushu University) ;
  • Sato, Yukio (Department of Materials Science and Engineering, Kyushu University) ;
  • Teranishi, Ryo (Department of Materials Science and Engineering, Kyushu University) ;
  • Kaneko, Kenji (Department of Materials Science and Engineering, Kyushu University)
  • Received : 2017.09.20
  • Accepted : 2017.10.17
  • Published : 2018.03.30
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Abstract

Barium titanate ($BaTiO_3$) nanoparticle is one of the most promising materials for future multi-layer ceramic capacitor and ferroelectric random access memory. It is well known that electrical property of nanoparticles depends on the atomistic structure. Although surface may possibly have an impact on the atomistic structure, reconstructed structure at the surface has not been widely investigated. In the present study, Ba-ion position near surface in a $BaTiO_3$ nanoparticle has been quantitatively characterized by scanning transmission electron microscopy. It was found that some Ba ions at the surface were greatly displaced in non-uniform directions.

Keywords

References

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