Journal Article

FZJ-2023-02767

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Direct Visualization of Distorted Twin Boundaries in Ce-Doped GdFeO3

Ran, K. (Corresponding author)FZJ* ; Barthel, J.FZJ* ; Jin, L.FZJ* ; Daesung ; Buchheit, A.FZJ* ; Neuhaus, K.FZJ* ; Baumann, S.FZJ* ; Meulenberg, W. A.FZJ* ; Mayer, J.FZJ*

2023
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.nanolett.3c00318  doi:10.34734/FZJ-2023-02767

Abstract: Utilizing advanced transmission electron microscopy (TEM), the structure at the (110)-type twin boundary (TB) of Ce-doped GdFeO3 (C-GFO) has been investigated with picometer precision. Such a TB is promising to generate local ferroelectricity within a paraelectric system, while precise knowledge about its structure is still largely missing. In this work, a direct measurement of the cation off-centering with respect to the neighboring oxygen is enabled by integrated differential phase contrast (iDPC) imaging, and up to 30 pm Gd off-centering is highly localized at the TB. Further electron energy loss spectroscopy (EELS) analysis demonstrates a slight accumulation of oxygen vacancies at the TB, a self-balanced behavior of Ce at the Gd sites, and a mixed occupation of Fe2+ and Fe3+ at the Fe sites. Our results provide an informative picture with atomic details at the TB of C-GFO, which is indispensable to further push the potential of grain boundary engineering.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)
3. Materialwissenschaft u. Werkstofftechnik (ER-C-2)
4. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)
2. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)
3. 5353 - Understanding the Structural and Functional Behavior of Solid State Systems (POF4-535) (POF4-535)
4. DFG project 387282673 - Die Rolle von Grenzflächen in mehrphasigen Ceroxid-basierten Membranen für den Einsatz in Membranreaktoren (387282673) (387282673)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Science Citation Index Expanded ; Web of Science Core Collection

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