Mapping octahedral tilts and polarization across a domain wall in BiFeO3 from Z-contrast scanning transmission electron microscopy image atomic column shape analysis

Albina Y. Borisevich; Oleg S. Ovchinnikov; Hye Jung Chang; Mark P. Oxley; Pu Yu; Jan Seidel; Eugine A. Eliseev; Anna N. Morozovska; Ramamoorthy Ramesh; Stephen J. Pennycook; Sergei V. Kalinin

doi:10.1021/nn1011539

Mapping octahedral tilts and polarization across a domain wall in BiFeO₃ from Z-contrast scanning transmission electron microscopy image atomic column shape analysis

Albina Y. Borisevich, Oleg S. Ovchinnikov, Hye Jung Chang, Mark P. Oxley, Pu Yu, Jan Seidel, Eugine A. Eliseev, Anna N. Morozovska, Ramamoorthy Ramesh, Stephen J. Pennycook, Sergei V. Kalinin

electron Microscopy and Microanalysis

Research output: Contribution to journal › Article › peer-review

150 Scopus citations

Abstract

Oxygen octahedral tilts underpin the functionality of a large number of perovskite-based materials and heterostructures with competing order parameters. We show how a precise analysis of atomic column shapes in Z-contrast scanning transmission electron microscopy images can reveal polarization and octahedral tilt behavior across uncharged and charged domain walls in BiFeO₃. This method is capable of visualizing octahedral tilts to much higher thicknesses than phase contrast imaging. We find that the octahedral tilt transition across a charged domain wall is atomically abrupt, while the associated polarization profile is diffuse (1.5-2 nm). Ginzburg-Landau theory then allows the relative contributions of polarization and the structural order parameters to the wall energy to be determined.

Original language	English
Pages (from-to)	6071-6079
Number of pages	9
Journal	ACS Nano
Volume	4
Issue number	10
DOIs	https://doi.org/10.1021/nn1011539
State	Published - Oct 26 2010

Keywords

bismuth ferrite
ferroelectric domain walls
principal component analysis
scanning transmission electron microscopy

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10.1021/nn1011539

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Borisevich, A. Y., Ovchinnikov, O. S., Chang, H. J., Oxley, M. P., Yu, P., Seidel, J., Eliseev, E. A., Morozovska, A. N., Ramesh, R., Pennycook, S. J., & Kalinin, S. V. (2010). Mapping octahedral tilts and polarization across a domain wall in BiFeO₃ from Z-contrast scanning transmission electron microscopy image atomic column shape analysis. ACS Nano, 4(10), 6071-6079. https://doi.org/10.1021/nn1011539

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title = "Mapping octahedral tilts and polarization across a domain wall in BiFeO3 from Z-contrast scanning transmission electron microscopy image atomic column shape analysis",

abstract = "Oxygen octahedral tilts underpin the functionality of a large number of perovskite-based materials and heterostructures with competing order parameters. We show how a precise analysis of atomic column shapes in Z-contrast scanning transmission electron microscopy images can reveal polarization and octahedral tilt behavior across uncharged and charged domain walls in BiFeO3. This method is capable of visualizing octahedral tilts to much higher thicknesses than phase contrast imaging. We find that the octahedral tilt transition across a charged domain wall is atomically abrupt, while the associated polarization profile is diffuse (1.5-2 nm). Ginzburg-Landau theory then allows the relative contributions of polarization and the structural order parameters to the wall energy to be determined.",

keywords = "bismuth ferrite, ferroelectric domain walls, principal component analysis, scanning transmission electron microscopy",

author = "Borisevich, {Albina Y.} and Ovchinnikov, {Oleg S.} and Chang, {Hye Jung} and Oxley, {Mark P.} and Pu Yu and Jan Seidel and Eliseev, {Eugine A.} and Morozovska, {Anna N.} and Ramamoorthy Ramesh and Pennycook, {Stephen J.} and Kalinin, {Sergei V.}",

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doi = "10.1021/nn1011539",

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Borisevich, AY, Ovchinnikov, OS, Chang, HJ, Oxley, MP, Yu, P, Seidel, J, Eliseev, EA, Morozovska, AN, Ramesh, R, Pennycook, SJ & Kalinin, SV 2010, 'Mapping octahedral tilts and polarization across a domain wall in BiFeO₃ from Z-contrast scanning transmission electron microscopy image atomic column shape analysis', ACS Nano, vol. 4, no. 10, pp. 6071-6079. https://doi.org/10.1021/nn1011539

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T1 - Mapping octahedral tilts and polarization across a domain wall in BiFeO3 from Z-contrast scanning transmission electron microscopy image atomic column shape analysis

AU - Borisevich, Albina Y.

AU - Ovchinnikov, Oleg S.

AU - Chang, Hye Jung

AU - Oxley, Mark P.

AU - Yu, Pu

AU - Seidel, Jan

AU - Eliseev, Eugine A.

AU - Morozovska, Anna N.

AU - Ramesh, Ramamoorthy

AU - Pennycook, Stephen J.

AU - Kalinin, Sergei V.

PY - 2010/10/26

Y1 - 2010/10/26

N2 - Oxygen octahedral tilts underpin the functionality of a large number of perovskite-based materials and heterostructures with competing order parameters. We show how a precise analysis of atomic column shapes in Z-contrast scanning transmission electron microscopy images can reveal polarization and octahedral tilt behavior across uncharged and charged domain walls in BiFeO3. This method is capable of visualizing octahedral tilts to much higher thicknesses than phase contrast imaging. We find that the octahedral tilt transition across a charged domain wall is atomically abrupt, while the associated polarization profile is diffuse (1.5-2 nm). Ginzburg-Landau theory then allows the relative contributions of polarization and the structural order parameters to the wall energy to be determined.

AB - Oxygen octahedral tilts underpin the functionality of a large number of perovskite-based materials and heterostructures with competing order parameters. We show how a precise analysis of atomic column shapes in Z-contrast scanning transmission electron microscopy images can reveal polarization and octahedral tilt behavior across uncharged and charged domain walls in BiFeO3. This method is capable of visualizing octahedral tilts to much higher thicknesses than phase contrast imaging. We find that the octahedral tilt transition across a charged domain wall is atomically abrupt, while the associated polarization profile is diffuse (1.5-2 nm). Ginzburg-Landau theory then allows the relative contributions of polarization and the structural order parameters to the wall energy to be determined.

KW - bismuth ferrite

KW - ferroelectric domain walls

KW - principal component analysis

KW - scanning transmission electron microscopy

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Mapping octahedral tilts and polarization across a domain wall in BiFeO₃ from Z-contrast scanning transmission electron microscopy image atomic column shape analysis

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