کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329161 978889 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ferromagnetic ordering in ThSi2 type CeAu0.28Ge1.72
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Ferromagnetic ordering in ThSi2 type CeAu0.28Ge1.72
چکیده انگلیسی

The compound CeAu0.28Ge1.72 crystallizes in the ThSi2 structure type in the tetragonal space group I41/amd with lattice parameters a=b=4.2415(6) Å c=14.640(3) Å. CeAu0.28Ge1.72 is a polar intermetallic compound having a three-dimensional Ge/Au polyanion sub-network filled with Ce atoms. The magnetic susceptibility data show Curie–Weiss law behavior above 50 K. The compound orders ferromagnetically at ∼8 K with estimated magnetic moment of 2.48 μB/Ce. The ferromagnetic ordering is confirmed by the heat capacity data which show a rise at ∼8 K. The electronic specific heat coefficient (γ) value obtained from the paramagnetic temperature range 15–25 K is∼124(5) mJ/ mol K2. The entropy change due to the ferromagnetic transition is ∼4.2 J/mol K which is appreciably reduced compared to the value of R ln(2) expected for a crystal-field-split doublet ground state and/or Kondo exchange interactions.

CeAu0.28Ge1.72 crystallizes in the ThSi2 structure type in the tetragonal space group I41/amd and orders ferromagnetically at ∼8 K.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 183, Issue 4, April 2010, Pages 878–882
نویسندگان
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