کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9803391 1516466 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of the concentration of Sb ions onto the local crystal and electronic structures of CuCr2−xSbxS4 (x = 0.3, 0.4, 0.5) studied by XANES and EXAFS measurements and LAPW numerical calculations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The influence of the concentration of Sb ions onto the local crystal and electronic structures of CuCr2−xSbxS4 (x = 0.3, 0.4, 0.5) studied by XANES and EXAFS measurements and LAPW numerical calculations
چکیده انگلیسی
The X-ray absorption K-edges of sulfur in CuCr2−xSbxS4 (x = 0.3, 0.4, 0.5) have been measured and compared to linearized augmented plain wave (LAPW) numerical calculations. The near edge region is generated by magnetically polarized and hybridized S 2p energy levels and shows small change with increased Sb content, which can be attributed to the movement of Cr 3d spin-down states up on the energy scale. The LAPW result confirms this effect. Moreover, the calculations show that the antimony in those spinels is rather in +3 than in +5 valence state. The calculated magnetic moment on Cr equals to 2.72μB. In EXAFS, there is no visible change between x = 0.3 and 0.5 spectra, which indicates that the local structure does not change significantly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 401, Issues 1–2, 29 September 2005, Pages 145-149
نویسندگان
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