| Autor: |
AAS, C. J., SZUNYOGH, L., CHANTRELL, R. W. |
| Zdroj: |
Europhysics Letters; Jun2013, Vol. 102 Issue 5, p1-5, 5p |
| Abstrakt: |
We perform first-principles calculations of the magnetocrystalline anisotropy energy (MAE) of the L10-like FexPt1-x samples studied experimentally by Barmak and co-workers (see J. Appl. Phys., 98 (2005) 033904). The variation of composition and long-range chemical order in the samples was studied in terms of the coherent potential approximation. In accordance with experimental observations, we find that, in the presence of long-range chemical disorder, Fe-rich samples exhibit a larger MAE than stoichiometric FePt. By considering the site- and species-resolved contributions to the MAE, we infer that the MAE is primarily a function of the degree of completeness of the nominal Fe layers in the L1 o FePt structure. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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