کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1627919 | 1516460 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physical properties of the RNi4Cu (RÂ =Â rare earth) compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Physical properties of the RNi4Cu (RÂ =Â rare earth) compounds Physical properties of the RNi4Cu (RÂ =Â rare earth) compounds](/preview/png/1627919.png)
چکیده انگلیسی
RNi4Cu (R = Y, Ce, Pr, Nd, Sm, Gd, Dy and Yb) compounds have been studied by means of the X-ray powder diffraction, magnetization, dc magnetic susceptibility, and electrical resistivity measurements. These compounds order ferromagnetically between 3.7 K (Pr) and 36.5 K (Gd). The temperature dependence of the electrical resistivity, Ï(T), reflects the metallic character of these compounds. Furthermore, the characteristic changes of the slope of the Ï(T) plots confirm the magnetic transitions. YNi4Cu is used as the nonmagnetic reference material. CeNi4Cu is paramagnetic and follows the modified Curie-Weiss law with μeff = 0.9 μB/f.u. This effective magnetic moment is much lower than the free Ce3+ ion value. At low temperatures Ï(T) reveals a shallow minimum characteristic of the Kondo-like effect. YbNi4Cu does not order magnetically down to 4 K. In the temperature range 100-300 K its magnetic susceptibility fulfills the Curie-Weiss law with the parameters θ = â195 K and μeff â 5 μB/f.u. This effective magnetic moment is close to the value expected for the 4f13 configuration, i.e., 4.54 μB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 413, Issues 1â2, 9 March 2006, Pages 1-6
Journal: Journal of Alloys and Compounds - Volume 413, Issues 1â2, 9 March 2006, Pages 1-6
نویسندگان
A. Kowalczyk, T. ToliÅski, B. Andrzejewski, A. Szlaferek,