Geometric phase analysis of nano-scale strain fields around 90° domains in PbTiO3/SrTiO3 epitaxial thin film

Takanori Kiguchi, Kenta Aoyagi, Toyohiko J. Konno, Satoru Utsugi, Tomoaki Yamada, Hiroshi Funakubo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The nano-scale strain fields analysis around 90° domains and misfit dislocations in PbTiO3/SrTiO3 001 epitaxial thin film has been conducted using the geometric phase analysis (GPA) combined with high angle annular dark field - scanning transmission electron microscopy (HAADF-STEM). The films typically possess a-c mixed domain configuration with misfit dislocations. The PbTiO3 layer was formed from the two layer the upper 200 nm layer shows the typical a- and c- mixed domain configuration where the a-domains are several tens nm in width; the bottom 100 nm layer shows the different domain configuration that the width is several nm. In the latter case, a-domains are terminated within the film and are short in length. On the other hand, the bottom of a-domains does not contact the film/substrate interface. It keeps away from the interface, and there is completely c-domain layer under a-domains. The HAADF-STEM-GPA shows that the strain fields around an a-domain and a misfit dislocation interact each other, the tensile strain field and lattice plane bending fit together. This result infers that the a-domain originates from the misfit dislocation.

Original languageEnglish
Title of host publicationMultiferroic and Ferroelectric Materials
Pages54-59
Number of pages6
Publication statusPublished - 2010
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: 2009 Nov 302009 Dec 4

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1199
ISSN (Print)0272-9172

Other

Other2009 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period09/11/3009/12/4

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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