Nanometer-scale local structural study of the paraelectric cubic phase of KNbO3 by convergent-beam electron diffraction

Kenji Tsuda, Michiyoshi Tanaka

Research output: Contribution to journalArticle

Abstract

Nanometer-scale local structures of the paraelectric cubic phase of potassium niobate (KNbO3) are examined by convergent-beam electron diffraction (CBED) using a nanometer-size electron probe. The breaking of the cubic symmetry has been directly observed in the nanometer-scale areas of the cubic phase of KNbO3. This indicates the existence of local polarization clusters in the cubic phase. Symmetry breaking index maps for the fourfold rotation symmetry are given at different temperatures with the combined use of scanning transmission electron microscopy (STEM) and CBED (STEM-CBED).

Original languageEnglish
Article number10PB09
JournalJapanese journal of applied physics
Volume56
Issue number10
DOIs
Publication statusPublished - 2017 Oct 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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