High-frequency properties of oriented hcp-Co1-xIrx (0.06 ⩽ × ⩽ 0.24) soft magnetic films.

In this work, the composition dependence of high-frequency magnetic properties for the oriented hcp-Co_1-xIr_x soft magnetic films with negative uniaxial magnetocrystalline anisotropy (K_u^grain) and in-plane uniaxial anisotropy field (H_u) is investigated. Both the saturation magnetization (M_s), K_u^grain, and H_u are greatly affected by the composition of Ir. The (μ_i - 1) . fr of Co_1-xIr_x (with negative K_u^grain) is larger than Acher's limit (without K_u^grain) when x exceeds 0.14. The increasing percent of (μ_i - 1) . fr could get a maximum of 42% when x is 0.2. [ABSTRACT FROM AUTHOR]