Open AccessValence‐difference contrast measurements utilizing X‐ray anomalous scattering
Author(s) -
Sasaki Satoshi,
Toyoda Takeshi,
Yamawaki Kouji,
Ohkubo Koichi
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597018086
Subject(s) - valence (chemistry) , scattering , contrast (vision) , anomalous scattering , x ray , physics , materials science , atomic physics , optics , quantum mechanics
Anomalous scattering experiments with X‐ray wavelengths close to an absorption edge have made it possible to determine independently the behaviour of ions in different valence states. The anomalous scattering factors of Fe 2+ and Fe 3+ obtained from both absorption and diffraction data have a large difference in f ′ between the two kinds of ions. Using a valence‐difference contrast method, Bragg and diffuse scattering measurements were carried out for single crystals of Fe 3 O 4 at low temperatures. The results demonstrate the ability of the contrast method to resolve charge ordering and valence fluctuation details.