کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990715 | 1516130 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Ni doping on the magnetic and electronic properties of half heusler Cu1-xNixMnSb alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effect of Ni-doping on the magnetic and electronic properties of cubic half heusler Cu1-xNixMnSb (xâ¯=â¯0.04, 0.07, 0.1, 0.125) compounds have been investigated both experimentally and theoretically in light of the development of half-metallic ferromagnetism (HMFM) in xâ¯=â¯1, NiMnSb. Our findings reveal that Ni-substitution introduces ferromagnetic (FM) correlations within the parent AFM matrix of CuMnSb. This is followed by the reduction in spin-down density of states (DOS) at the Fermi energy (EF), verified from the gradual suppression of T2-dependency in the low T resistivity variation upon increasing doping content. The ab-initio electronic structure calculations further suggest that the Sb p-holes, produced upon Ni doping, mediate the RKKY-type indirect FM exchange between the distant Mn atoms, and consequently, the spin-down DOS starts to get depleted at the Fermi energy. Further the importance of the Sb p-holes in mediating ferromagnetic (FM) exchange interaction, is illustrated theoretically on Fe-doped Cu1-x FexMnSb systems having identical crystal structure, where appreciable Sb holes stabilizes FM correlations at much lower concentration of Fe.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 656-664
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 656-664
نویسندگان
A. Bandyopadhyay, S.K. Neogi, A. Paul, C. Meneghini, I. Dasgupta, Sugata Ray,