Theoretical Study of the Electronic Properties of X2YZ (X = Fe, Co; Y = Zr, Mo; Z = Ge, Sb) Ternary Heusler: Abinitio Study
| Autor: | A. Oughilas, A. Maafa, D. Lucache, A. Boubaça, A. Amar, H. Rozale |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics QC1-999 020502 materials 02 engineering and technology General Medicine heusler alloys 01 natural sciences 0205 materials engineering 0103 physical sciences electronic properties Physical chemistry magnetic properties 010306 general physics Ternary operation half metallic zone 3d and 4d elements Electronic properties |
| Zdroj: | Annals of West University of Timisoara: Physics, Vol 62, Iss 1, Pp 1-14 (2020) |
| ISSN: | 1224-9718 |
| DOI: | 10.2478/awutp-2020-0001 |
| Popis: | In the purpose of exploring new Heusler alloys with different magnetic applications, we have employed first principles calculations method within density functional theory. After checking the structural stability of X2YZ Heusler alloys (X = Fe, Co; Y =Zr, Mo and Z = Ge, Sb), we found that Cu2MnAl type structure is more favorable for most compounds except for X2MoGe and Co2MoSb, were the Hg2CuTi structure is energetically more stable. The trends in magnetic and electronic structures can be predicted by the structure types as well as the different kinds of hybridizations between the constituents. Among the two series only two compounds were identified to be true half metals with potential applications in spintronic devices. While one compound was classified as a nonmagnetic semiconductor with a small band gap. For the rest of materials, we found that the metallic behavior is dominant. These materials show possible interesting features in technical applications as well. The effect of distortion on the magnetic properties of Co2ZrGe and Fe2ZrSb showed that the half metallic character was preserved within a moderate range of volume changes, which makes it possible to grow these materials as thin films with modern techniques. |
| Databáze: | OpenAIRE |
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