| Autor: |
Dhakal, R., Nepal, S., Ray, R. B., Paudel, R., Kaphle, G. C. |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Journal of Magnetism and Magnetic Materials 503 (2020), 166588 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.jmmm.2020.166588 |
| Popis: |
Heusler alloys with Mn and Co have been found to exhibit interesting electronic and magnetic properties. Mn$_2$CoAl is well known SGS compound while Mn$_2$CoGa has weak half metallic character. By using plane wave pseudo-potential method, we studied the effect of Fe and Cr doping on half-metalicity and magnetism of these compounds. The doping destroys the SGS nature of Mn$_2$CoAl while the small-scale doping enhance the half-metallicity of Mn$_2$CoGa making it perfect half-metal. In case of Mn$_2$CoAl, the doping decrease the band gap while increase in band width is noticed for Mn$_2$CoGa. The half-metallicity is destroyed in both cases when the doping level is beyond certain degree. Moreover, we have also computed magnetic behavior of Mn$_2$CoZ alloys and we found that total magnetic moments of dopped samples have higher values than that of pristine compounds. |
| Databáze: |
arXiv |
| Externí odkaz: |
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