Magnetism, band gap and stability of half-metallic property for the quaternary Heusler alloys CoFeTiZ (Z = Si, Ge, Sn)
Magnetism, band gap and stability of half-metallic property for the quaternary Heusler alloys CoFeTiZ (Z = Si, Ge, Sn)
复制标题
DOI：
10.1016/j.jallcom.2014.07.165
复制
发表时间：
2014-12
影响因子：
6.2
通讯作者：
Y. J. Zhang;Z. H. Liu;Guangqi Li;Xingqiao Ma;Guihua Liu
中科院分区：
文献类型：
--
作者：
Y. J. Zhang;Z. H. Liu;Guangqi Li;Xingqiao Ma;Guihua Liu
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.
