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Determination of the cationic distribution in oxidic thin films by resonant X‐ray diffraction: the magnetoelectric compound Ga 2− x Fe x O 3
Author(s) -
Lefevre Christophe,
Thomasson Alexandre,
Roulland Francois,
Favre-Nicolin Vincent,
Joly Yves,
Wakabayashi Yusuke,
Versini Gilles,
Barre Sophie,
Leuvrey Cedric,
Demchenko Anna,
Boudet Nathalie,
Viart Nathalie
Publication year - 2016
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576716010001
Subject(s) - cationic polymerization , diffraction , materials science , thin film , gallium , scattering , x ray crystallography , neutron diffraction , crystallography , ferrite (magnet) , x ray , analytical chemistry (journal) , condensed matter physics , nuclear magnetic resonance , optics , nanotechnology , chemistry , physics , metallurgy , composite material , chromatography , polymer chemistry
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 Ga 2− x Fe x O 3 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 BiFeO 3 . The methodology can be applied to determine the element distribution over the various crystallographic sites in any crystallized system.