کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1600113 | 1515865 | 2014 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: First-principles study on half-metallic properties of the CoMnZ (Z = S, Se, Te) half-Heusler compounds First-principles study on half-metallic properties of the CoMnZ (Z = S, Se, Te) half-Heusler compounds](/preview/png/1600113.png)
• CoMnTe is predicted to be half-metallic ferromagnet.
• CoMnS and CoMnSe compounds are nearly half-metallic.
• All compounds have a total magnetic moment of 4 μB/f.u.
• The spin-down bands of CoMnTe are semiconductor with a gap of 1.04 eV.
• The spin-flip gap CoMnTe is of 0.37 eV.
The first-principles calculations based on the density functional theory have been employed to explore the electronic structure and magnetic properties of the CoMnZ (Z = S, Se, Te) half-Heusler compound. CoMnTe is predicted to be half-metallic ferromagnet with an energy gap of 1.04 eV in the minority spin and a completely spin polarization at the Fermi level. CoMnS and CoMnSe compounds are nearly half-metallic with spin polarization of 98.9 and 97.9%, respectively. All compounds have a total magnetic moment of 4 μB/f.u., which agrees with the Slater–Pauling rule. CoMnTe compound keeps half-metallicity within a wide range of lattice constants between 5.65 and 6.05 Å. Under tetragonal distortions, high spin polarization at the Fermi level is maintained for the CoMnTe compound.
Journal: Intermetallics - Volume 46, March 2014, Pages 45–50