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Temperature evolution of Fe–27Ga structure: comparison of in situ X‐ray and neutron diffraction studies
Author(s) -
Bobrikov Ivan A.,
Samoylova Nataliya Yu.,
Sumnikov Sergey V.,
Ivanshina Olga Yu.,
Korneeva Ekaterina A.,
Balagurov Anatoly M.,
Golovin Igor S.
Publication year - 2020
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/s1600576720010948
Subject(s) - neutron diffraction , diffraction , materials science , phase (matter) , alloy , neutron , x ray crystallography , scattering , gallium , x ray , crystallography , analytical chemistry (journal) , phase transition , chemistry , condensed matter physics , optics , physics , nuclear physics , metallurgy , organic chemistry , chromatography
Comparative in situ X‐ray and neutron diffraction studies of the phase transitions in a high magnetostriction Fe–27Ga alloy sample have been performed, with heating up to 850°C and subsequent cooling to room temperature. Different structural information (phase content, phase‐transition temperatures, unit‐cell behaviour) is obtained for the bulk sample and its surface, and this fact is discussed here in terms of the difference between the scattering properties of X‐rays and neutrons. In particular, a gallium‐deficient phase with A2‐type structure was found on the surface of the sample. The results demonstrate that conventional X‐ray diffraction methods are insufficient for precise structural analysis of bulk samples of galfenols and cannot be used alone to build their phase diagrams.