We investigated the Gilbert damping constant of the Heusler Co 2 MnSi(001) films epitaxially grown on a MgO(100) substrate by a ferromagnetic resonance technique. The angular variation in resonance field in the in-plane geometry exhibited a maximum when the field was applied parallel to the [110] direction (easy axis), and its relative minimum corresponded to the H∥[100] hard axis. Experimental results were fitted with theoretical results; the g -value, effective magnetization and anisotropy constants were determined. The magneto-crystalline anisotropy of the films decreased after the films were post-annealed at 400 °C. The Gilbert damping parameter was anisotropic and had a minimum value at 300 °C.
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Yilgin et al. (2007) studied this question.
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