کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9804045 1516477 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
R dependence of electronic structure in perovskite type structure compounds, RBRh3 (R: Sc, Y and La)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
R dependence of electronic structure in perovskite type structure compounds, RBRh3 (R: Sc, Y and La)
چکیده انگلیسی
The electronic structures of perovskite type structure, RBRh3 (R: Sc, Y and La) were studied by X-ray photoelectron spectroscopy and calculation with full potential linearized augmented plane wave (FLAPW) method. As the lattice constant of the crystals increases with the atomic number of R, it can be discussed how the bond length between boron and rhodium atoms effect on the bonding character. The valence band XPS profiles of the samples are well coincided with the calculated profiles. The calculated electron density maps of the valence bands indicate the following. The charge transfer directions are from R to rhodium atoms and from boron to rhodium atoms. The bonds of RRh and BRh atoms have also covalent character. The covalency of RRh bond increases with the order of the atomic number of R atoms. On the other hand, the covalent bond of BRh decreases with the order atomic number.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 390, Issues 1–2, 22 March 2005, Pages 202-207
نویسندگان
, , , , ,