Resonant X-ray scattering study at Y K-edge in Y1-xCaxTiO3

Resonant X-ray scattering (RXS) in Y1-xCaxTiO3 has been investigated near the Y K-edge. The resonant signal has been clearly found at a forbidden reflection, (500), and the intensity shows an azimuthal angle dependence with a twofold symmetry. The RXS intensities have almost no Ca concentration depe...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2006-09, Vol.75 (9)
Main Authors: NAKAO, Hironori, KODAMA, Soukichi, IKEDA, Naoshi, KIYOTO, Kouhei, MURAKAMI, Youichi, TSUBOTA, Masami, IGA, Fumitoshi, UCHIHIRA, Kazuyuki, TAKABATAKE, Toshiro, OHSUMI, Hiroyuki, MIZUMAKI, Masaichiro
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Metal-insulator transitions and other electronic transitions
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other interactions of matter with particles and radiation
Physics
X-ray scattering
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Summary:Resonant X-ray scattering (RXS) in Y1-xCaxTiO3 has been investigated near the Y K-edge. The resonant signal has been clearly found at a forbidden reflection, (500), and the intensity shows an azimuthal angle dependence with a twofold symmetry. The RXS intensities have almost no Ca concentration dependence, although the RXS intensities at the Ti K-edge markedly decrease with increasing Ca concentration. The origin of the RXS at the Y K-edge is clarified to be the deviation from 180° of the Ti-O-Ti bond angle, namely, the tilts of the octahedra around the Y ion. We also discuss the RXS mechanism at the main edge of the Ti K-edge.
ISSN:0031-9015
1347-4073