کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490592 | 1524793 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Volume dependence of magnetic properties in Co2Cr1âxYxGa (Y=Ti-Ni) Heusler alloys: A first-principles study
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The magnetic properties tuning and volume dependence in the series of quaternary full Heusler alloys with formula Co2Cr1âxYxGa (Y=Ti, V, Mn, Fe, Co, Ni) were studied with a detailed first-principles exploration. We employ the density functional KKR method with the coherent potential approximation, estimating effective Heisenberg exchange constants via the magnetic force theorem together with mean-field Curie temperature (TC) and magnetic moment for compositions in the whole concentration range. The volumetric dependency of these magnetic properties is studied, particularly the pressure derivatives of TC at equilibrium. Our ternary alloy calculations show good agreement with local-density and generalized gradient approximations in the literature. The quaternary alloys show a wide range of tunable magnetic properties, where magnetic moments range from 0.8 to 4.9 μB, TC from 130 K to 1250 K, and dTC/dV values range from â7 to +6.3KÃ
â3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 428, 15 April 2017, Pages 362-367
Journal: Journal of Magnetism and Magnetic Materials - Volume 428, 15 April 2017, Pages 362-367
نویسندگان
J.N. Gonçalves, N.M. Fortunato, J.S. Amaral, V.S. Amaral,