Abstract
In this work, the composition dependence of high-frequency magnetic properties for the oriented hcp-Co1−xIrx soft magnetic films with negative uniaxial magnetocrystalline anisotropy (Kugrain) and in-plane uniaxial anisotropy field (Hu) is investigated. Both the saturation magnetization (Ms), Kugrain, and Hu are greatly affected by the composition of Ir. The (μi−1)⋅fr of Co1−xIrx (with negative Kugrain) is larger than Acher's limit (without Kugrain) when x exceeds 0.14. The increasing percent of (μi−1)⋅fr could get a maximum of 42% when x is 0.2.
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