Evolution of magnetic properties and damping coefficient of Co2MnSi Heusler alloy with Mn/Si and Co/Mn atomic disorder. (12th December 2016)

• Record Type: Journal Article
• Authors: Abdallah, I; Pradines, B; Ratel-Ramond, N; BenAssayag, G; Arras, R; Calmels, L; Bobo, J F; Snoeck, E; Biziere, N
• Is Part Of: Journal of physics. Volume 50:Number 3(2017)
• Publication Date: 2016-12-12
• Subjects: magnetism -- Heusler alloy -- atomic disorder -- dynamic damping; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/50/3/035003
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Ferromagnetic resonance has been used to investigate the effect of a Mn/Si and a Co/Mn atomic disorder on the magnetic properties and dynamic relaxation of Co2 MnSi Heusler alloy. He + ion irradiation at 150 KeV is used to induce a Co/Mn and Mn/Si swap in the initial structure of the material. While a Mn/Si disorder is found to show similar magnetic behavior as compared to the L21 order, we observe a strong impact of a 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.