Oxygen vacancy distribution in different regions of La1−xSrxGa1−yMgyO3−δ
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides · Advancements in Solid Oxide Fuel Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences 1 , Jahnstraße 12, 8700 Leoben,
Center for Electron Microscopy and Microanalysis, Jožef Stefan Institute 2 , Jamova cesta 39, 1000 Ljubljana,
Department for Nanostructured Materials, Jožef Stefan Institute 3 , Jamova cesta 39, 1000 Ljubljana,
Institute of Chemical Technologies and Analytics, TU Wien 4 , Getreidemarkt 9, A-1060 Vienna,
Department of Nuclear Science and Engineering, Massachusetts Institute of Technology 5 , 77 Massachusetts Avenue, Cambridge, Massachusetts 02141,
Jožef Stefan International Postgraduate School 6 , Jamova cesta 39, SI-1000 Ljubljana,
Department of Geology, Faculty of Natural Sciences and Engineering, University of Ljubljana 7 , Aškerčeva cesta 12, SI-1000 Ljubljana,
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