Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1600140 | Intermetallics | 2014 | 7 Pages |
Abstract
Half-metallic properties of new Heusler alloys Sc2MnZ (Z = C, Si, Ge, and Sn) have been studied by first-principles calculations based on the density functional theory (DFT) using the self-consistent full-potential linearized augmented plane wave (FPLAPW) method. The results showed that the Sc2MnZ (Z = C, Si, Ge, and Sn) compounds in AlCu2Mn-type structure and Sc2MnC in CuHg2Ti-type structure are conventional ferrimagnets. The Sc2MnZ (Z = Si, Ge, and Sn) compounds were half-metallic ferrimagnets in the CuHg2Ti-type structure. In the CuHg2Ti-type structure, the calculated majority spin band gaps were 0.50 eV, 0.41 eV, and 0.26 eV for Sc2MnSi, Sc2MnGe and Sc2MnSn, respectively. The obtained total magnetic moments of Sc2MnZ (Z = Si, Ge, and Sn) compounds in the CuHg2Ti-type structures were 1 μB per formula unit which were in agreement with Slater-Pauling rule (Mtot = 18 â Ztot). In addition, the reason for appearance of half-metallic band gap in the Sc2MnGe compound was also discussed. The Sc2MnSi, Sc2MnGe, and Sc2MnSn compounds in the CuHg2Ti-type structure showed half-metallic characteristics at lattice constants ranges of 6.12-6.65 Ã
, 6.07-6.63Â Ã
, and 6.18-6.81Â Ã
, respectively, which make them interesting materials in the spintronics field.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
F. Ahmadian, A. Salary,