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

Bondevik, Tarjei; Ness, Heine H.; Bazioti, Kalliopi; Norby, Truls Eivind; Løvvik, Ole Martin; Koch, Christoph T.; Prytz, Øystein
Journal article; AcceptedVersion; Peer reviewed
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final_Investiga ... ne-electron-holography.pdf (1.807Mb)
Year
2019
Permanent link
http://urn.nb.no/URN:NBN:no-77211

CRIStin
1715394

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  • Kjemisk institutt [825]
  • Fysisk institutt [2253]
  • Det matematisk-naturvitenskapelige fakultet [244]
  • CRIStin høstingsarkiv [15004]
Original version
Physical Chemistry, Chemical Physics - PCCP. 2019, 21 (32), 17662-17672, DOI: https://doi.org/10.1039/c9cp02676b
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.
 
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