کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8001030 1516277 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetism, band gap and stability of half-metallic property for the quaternary Heusler alloys CoFeTiZ (Z = Si, Ge, Sn)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Magnetism, band gap and stability of half-metallic property for the quaternary Heusler alloys CoFeTiZ (Z = Si, Ge, Sn)
چکیده انگلیسی
The electronic structures and magnetic properties of quaternary Heusler alloys CoFeTiZ (Z = Si, Ge, Sn) have been studied using first-principles calculations. It has been found that CoFeTiSi and CoFeTiGe are half-metallic ferrimagnets, while CoFeTiSn is a quasi half-metallic ferrimagnet. The total moment in unit cell for CoFeTiZ (Z = Si, Ge, Sn) alloys follows the Slater-Pauling behavior with the total number of valence electrons minus 24. The origin of the magnetism, band gap, and the effect of atom Z on the band gap and the half-metallicity of the alloys have been discussed in detail. The half-metallic property for CoFeTiSi and CoFeTiGe can be retained when their lattice constants are changed in a large range. CoFeTiSn alloy can transform from a quasi half-metallic to a half-metallic alloy by employing a proper compression stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 616, 15 December 2014, Pages 449-453
نویسندگان
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