کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8153170 | 1524762 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Peculiarities of the electronic transport in half-metallic Co-based Heusler alloys
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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
Electrical, magnetic and galvanomagnetic properties of half-metallic Heusler alloys of Co2YZ (Yâ¯=â¯Ti, V, Cr, Mn, Fe, Ni, and Zâ¯=â¯Al, Si, Ga, Ge, In, Sn, Sb) were studied in the temperature range 4.2-900â¯K and in magnetic fields of up to 100â¯kOe. It was found that varying Y in Co2YZ alloys affects strongly the electric resistivity and its temperature dependence Ï(T), while this effect is not observed upon changing Z. When Y is varied, extrema (maximum or minimum) are observed in Ï(T) near the Curie temperature TC. At Tâ¯â¤â¯TC, the Ï(T) behavior can be ascribed to a change in electronic energy spectrum near the Fermi level. The coefficients of normal and anomalous Hall effect were determined. It was shown that the latter coefficient, RS, is related to the residual resistivity Ï0 by a power law RSâ¯â¼â¯Ï0k/MS with MS the spontaneous magnetization. The exponent k was found to be 1.8 for Co2FeZ alloys, which is typical for asymmetric scattering mechanisms, and 2.9 for Co2YAl alloys, which indicates an additional contribution to the anomalous Hall effect. The temperature dependence of resistivity at low temperatures is analyzed and discussed in the frame of the two-magnon scattering theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 459, 1 August 2018, Pages 211-214
Journal: Journal of Magnetism and Magnetic Materials - Volume 459, 1 August 2018, Pages 211-214
نویسندگان
V.V. Marchenkov, Yu.A. Perevozchikova, N.I. Kourov, V.Yu. Irkhin, M. Eisterer, T. Gao,