کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9801884 1515733 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic phase transitions in intermetallic CeCuGe compound
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Magnetic phase transitions in intermetallic CeCuGe compound
چکیده انگلیسی
Electrical and magnetic properties of CeCuGe were investigated through electrical resistivity, thermal conductivity and magnetization measurements in the temperature range 2-300 K. Magnetization measurements indicate a paramagnetic to ferromagnetic transition at T=10 K, in agreement with previous work. There are two distinct paramagnetic regimes: At high-T the magnetic moment per cerium is 2.50 μB, nearly equal to the expected 2.54 μB for Ce3+, while at low-T the effective moment decreases to 2.20 μB per cerium. This decrease is attributed to crystalline electric field effects. In the ferromagnetic region, the hysteresis curve indicates a rather small anisotropy (Hc less than 20 Oe). There is also very little remanence (the ratio of the remanence to the technical saturation magnetization is about 0.05), implying that this material is magnetically quite soft, with a very small magnetocrystalline anisotropy, contrary to what was reported in a previous investigation. In the temperature regime 10-30 K the resistivity obeys a T2-behavior, consistent with the appearance of spin fluctuations above the ferromagnetic transition. In the same temperature regime, the thermo-power exhibits a linear rise in addition to a T2 term, anomalous behavior which we also attribute tentatively to the development of spin fluctuations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 136, Issues 9–10, December 2005, Pages 533-537
نویسندگان
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