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Investigation of the electrostatic potential of a grain boundary in Y-substituted BaZrO3 using inline electron holography

Abstract

We apply inline electron holography to investigate the electrostatic potential across an individual BaZr0.9Y0.1O3 grain boundary. With holography, we measure a grain boundary potential of −1.3 V. Electron energy loss spectroscopy analyses indicate that barium vacancies at the grain boundary are the main contributors to the potential well in this sample. Furthermore, geometric phase analysis and density functional theory calculations suggest that reduced atomic density at the grain boundary also contributes to the experimentally measured potential well.

Category

Academic article

Language

English

Author(s)

  • Tarjei Bondevik
  • Heine Håland Ness
  • Kalliopi Bazioti
  • Truls Eivind Norby
  • Ole Martin Løvvik
  • Christoph T. Koch
  • Øystein Prytz

Affiliation

  • SINTEF Industry / Sustainable Energy Technology
  • Humboldt University Berlin
  • University of Oslo

Year

2019

Published in

Physical Chemistry, Chemical Physics - PCCP

ISSN

1463-9076

Volume

21

Issue

32

Page(s)

17662 - 17672

View this publication at Norwegian Research Information Repository