Oxygen vacancy distribution in different regions of La1−<i>x</i>Sr<i>x</i>Ga1−<i>y</i>Mg<i>y</i>O3−<i>δ</i>
In this work, we systematically investigate the structure of Sr and Mg doped lanthanum gallate single crystals using x-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis revealed the presence of multiple domains with distinct lattice parameters. High-resolution TEM and integrated differential phase contrast imaging captured two regions, one with 90° symmetry and the other with non-90° symmetry. In addition, ordered oxygen vacancies in the non-90° region were revealed, while vacancies in the 90° region were randomly distributed. Energy-dispersive x-ray spectroscopy confirmed that the difference in the doping level of the two regions is within the detectability limits. However, the electron energy loss near-edge structure revealed detectable differences in their bonding character.
Authors
- Miran C̆eh (ORCID: https://orcid.org/0000-0003-4755-0862)
- Sergej Ražnjević (ORCID: https://orcid.org/0000-0001-7097-2284)
- Sandra Drev (ORCID: https://orcid.org/0000-0002-5721-4435)
- Sašo Šturm (ORCID: https://orcid.org/0000-0003-0019-7491)
- Matthäus Siebenhofer (ORCID: https://orcid.org/0000-0002-6450-0261)
- Zaoli Zhang (ORCID: https://orcid.org/0000-0002-7717-2500)
- Stanislaus Breitwieser
- Markus Kubicek (ORCID: https://orcid.org/0000-0001-6623-9805)
- Vinko Sršan
- Christin Böhme
Institutions
- TU Wien (AT)
- University of Ljubljana (SI)
- Jožef Stefan Institute (SI)
- Slovenian Centre of Excellence for Space Sciences and Technologies (SI)
- Jožef Stefan International Postgraduate School (SI)
- Erich Schmid Institute of Materials Science (AT)
- Massachusetts Institute of Technology (US)
Publication Details
- Journal
- APL Materials
- Published
- 2025-07-01
- DOI
- https://doi.org/10.1063/5.0273459
- Citations
- 1
- Primary Topic
- Magnetic and transport properties of perovskites and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.43