skip to main content

DOE PAGESDOE PAGES

Title: Observation of a periodic array of flux-closure quadrants in strained ferroelectric PbTiO3 films

Nanoscale ferroelectrics are expected to exhibit various exotic domain configurations, such as the full flux-closure pattern that is well known in ferromagnetic materials. Here we observe not only the atomic morphology of the flux-closure quadrant but also a periodic array of flux closures in ferroelectric PbTiO3 films, mediated by tensile strain on a GdScO3 substrate. Using aberration-corrected scanning transmission electron microscopy, we directly visualize an alternating array of clockwise and counterclockwise flux closures, whose periodicity depends on the PbTiO3 film thickness. In the vicinity of the core, the strain is sufficient to rupture the lattice, with strain gradients up to 109 per meter. We found engineering strain at the nanoscale may facilitate the development of nanoscale ferroelectric devices.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [5] ;  [5] ;  [6]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Shenyang National Lab. for Materials Science
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. National Academy of Sciences of Ukraine (NASU), Kiev (Ukraine). Inst. of Physics
  4. National Academy of Sciences of Ukraine (NASU), Kiev (Ukraine). Inst. for Problems of Materials Sciences
  5. Chinese Academy of Sciences (CAS), Shenyang (China). Shenyang National Lab. for Materials Science
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; National Univ. of Singapore (Singapore). Dept. of Materials Science and Engineering
Publication Date:
OSTI Identifier:
1265480
Grant/Contract Number:
AC05-00OR22725; 51231007; 51171190; 2014CB921002; 2009CB623705
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 348; Journal Issue: 6234; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY