Evolution of magnetic properties and damping coefficient of Co 2 MnSi Heusler alloy with Mn/Si and Co/Mn atomic disorder

Abstract : Ferromagnetic resonance has been used to investigate the effect of Mn/Si and Co/Mn atomic disorder on the magnetic properties and dynamic relaxation of Co 2 MnSi Heusler alloy. He + ion irradiation at 150 KeV is used to induce Co/Mn and Mn/Si swap in the initial structure of the material. While Mn/Si disorder is found to show similar magnetic behavior as compared to the L2 1 order, we observe a strong impact of Co/Mn swap on the static and dynamic properties of the alloy. These results are explained with regard to electronic band structure and damping coefficient first-principles calculations showing the modification of the minority-spin density of states at the Fermi energy and local magnetic orbital moment with Co/Mn swap.
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Evolution of magnetic properti...
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Iman Abdallah, Barthélémy Pradines, Nicolas Ratel-Ramond, Gérard Benassayag, Rémi Arras, et al.. Evolution of magnetic properties and damping coefficient of Co 2 MnSi Heusler alloy with Mn/Si and Co/Mn atomic disorder. Journal of Physics D: Applied Physics, IOP Publishing, 2017, 50 (3), pp.035003. ⟨10.1088/1361-6463/50/3/035003⟩. ⟨hal-01744846⟩

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