期刊
JOURNAL OF APPLIED CRYSTALLOGRAPHY
卷 49, 期 -, 页码 1308-1314出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600576716010001
关键词
resonant X-ray diffraction; cationic distribution; magnetoelectric oxide thin films
资金
- CNRS
- Ministere de l'Enseignement Superieur et de la Recherche (Paris)
- international ANR DFG chemistry project GALIMEO [2011-INTB-1006-01]
- Laboratory of Excellence 'Nanostructures in Interaction with their Environment' [LabEx NIE 11-LABX-0058-NIE]
The cationic distribution is decisive for both the magnetic and electric properties of complex oxides. While it can be easily determined in bulk materials using classical methods such as X-ray or neutron diffraction, difficulties arise for thin films owing to the relatively small amount of material to probe. It is shown here that a full determination of the cationic site distribution in thin films is possible through an optimized processing of resonant elastic X-ray scattering experiments. The method is illustrated using gallium ferrite Ga2-xFexO3 samples which have been the focus of an increasing number of studies this past decade. They indeed represent an alternative to the, to date, only room-temperature magnetoelectric compound BiFeO3. The methodology can be applied to determine the element distribution over the various crystallographic sites in any crystallized system.
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