Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.86: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

Magnetic moments and damping parameters of 4d and 5d transition metal doped FeCo alloys — •Rudra Banerjee, Carmine Autieri, and Biplab Sanyal — Uppsala University

FeCo alloys are very important for their high saturation magnetization and high Curie temperature, especially Fe_0.65Co_0.35 alloy that sits on the top of Slater-Pauling curve. However, there is a perpetual interest to achieve higher saturation moment. Also, for magnetic recording industry, materials with low damping parameters are sought for. Here we have done a systematic first principles study of FeCo alloys doped with 4d and 5d elements to study the magnetic behaviour of the systems. All the calculations have been done using density functional based Korringa-Kohn-Rostoker method with the configuration averaging described by coherent potential approximation. We report the saturation moments and Gilbert damping parameters for Fe_0.65Co_0.35−yX_y and Fe_0.65Co_0.35−y−zX_yX_z^′ system where X and X^′ are 4d and 5d elements. We have found that 4d and 5d co-doped FeCo alloys posses magnetization and damping parameters suitable for applications.