Journal article
Characterizing oxygen atoms in perovskite and pyrochlore oxides using ADF-STEM at a resolution of a few tens of picometers
- Abstract:
- We present an aberration corrected scanning transmission electron microscopy (ac-STEM) analysis of perovskite (LaFeO3) and pyrochlore (Yb2Ti2O7 and Pr2Zr2O7) oxides and demonstrate that both the shape and contrast of visible atomic columns in annular dark-field (ADF) images are sensitive to the presence of nearby atoms of low atomic number (e.g. oxygen). We show that point defects (e.g. oxygen vacancies), which are invisible – or difficult to observe due to limited sensitivity – in x-ray and neutron diffraction measurements, are the origin of the complex magnetic ground state of pyrochlore oxides. In addition, we present a method by which light atoms can be resolved in the quantitative ADF-STEM images. Using this method, we resolved oxygen atoms in perovskite and pyrochlore oxides and propose this method to be suitable for other materials containing both light and heavy elements.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Accepted manuscript, pdf, 1011.1KB, Terms of use)
-
- Publisher copy:
- 10.1016/j.actamat.2021.116717
Authors
- Publisher:
- Elsevier
- Journal:
- Acta Materialia More from this journal
- Volume:
- 208
- Article number:
- 116717
- Publication date:
- 2021-02-18
- Acceptance date:
- 2021-02-02
- DOI:
- EISSN:
-
1873-2453
- ISSN:
-
1359-6454
- Language:
-
English
- Keywords:
- Pubs id:
-
1166346
- Local pid:
-
pubs:1166346
- Deposit date:
-
2023-03-23
Terms of use
- Copyright holder:
- Acta Materialia
- Copyright date:
- 2021
- Rights statement:
- © 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- Notes:
- This is the accepted manuscript version of the article. The final version is available from Elsevier at: 10.1016/j.actamat.2021.116717
If you are the owner of this record, you can report an update to it here: Report update to this record