کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1623335 | 1516415 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evidence for clustering in Cu2+-doped CeO2
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Electron spin resonance spectra of Cu2+ in diluted solid solutions of Cu in CeO2 have been studied at room temperature for Cu concentrations between 0.20 and 0.80 mol%. Isolated Cu2+ ions were observed, as well as Cu2+ ions coupled by the exchange interaction. The linewidth and intensity of the line associated with isolated copper ions have a maximum between 0.60 and 0.80 mol%. The results suggest that the solid solution of Cu in CeO2 exhibits clustering effects, as was also observed in Mn:CeO2 solid solutions. A theoretical calculation based on this model yields an effective range of the exchange interaction between Cu2+ ions of 0.38 nm, smaller than that of Mn2+ ions in the same host lattice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 462, Issues 1–2, 25 August 2008, Pages 15–18
Journal: Journal of Alloys and Compounds - Volume 462, Issues 1–2, 25 August 2008, Pages 15–18
نویسندگان
R.S. de Biasi, M.L.N. Grillo,