کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1801258 | 1024565 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
XPS and thermomagnetic characterization of the CeNi4Cr compound
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The magnetic, thermodynamic and electronic structure properties are discussed for the CeNi4Cr compound. The X-ray photoemission spectra (XPS) provide an evidence of a mixed valence behavior with the occupancy of the f states nf=0.89 and their hybridization with the conduction electrons Î=30Â meV. These values reproduce well the magnetic susceptibility Ï(T=0), which is enhanced compared to similar CeNi4M (M=Al, B, Cu) compounds. In combination with a slightly increased electronic specific heat coefficient (up to 100Â mJÂ molâ1Â Kâ2), this compound can be classified as being on the border of the heavy fermion and mixed valence behavior. Using a small magnetic field in the Ï(T) measurements reveals a presence of magnetically ordered impurity phase, which is easily damped by higher fields and it is shown that the contribution of this phase is minor. The question of the dependence of the electronic specific heat coefficient on the magnetic field is also addressed and the observations agree well with theoretical predictions based on the Anderson model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 9, May 2009, Pages 1121-1124
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 9, May 2009, Pages 1121-1124
نویسندگان
T. ToliÅski, A. Kowalczyk, M. Reiffers, E. Gažo, M. Zapotokova, J. KovaÄ, G. CheÅkowska,