Magnetic Properties of Cluster/Thin-Film Laminated Hybrids of Fe–Pt and Fe–Co Alloys

抄録

Both Fe–Pt cluster/Fe–Co film and Fe–Co cluster/Fe–Pt film laminated hybrids have been prepared by combination of a plasma-gas-cluster-deposition and a helicon-plasma sputter-deposition and studied by X-ray diffraction and magnetization measurements. In Fe–Pt cluster/Fe–Co film laminated hybrids, M_S increases, while H_C and BH_MAX monotonically decrease with the Fe–Co film thickness. In Fe–Co cluster/Fe–Pt film laminated hybrids, M_S, H_C and BH_MAX increase with the Fe–Co cluster layer thickness in comparison with those of simple Fe–Pt films. However, the remarkable improvement of their hard magnetic properties cannot be attained in these laminated hybrids owing to both the low packing density of Fe–Co clusters and the difficulty in the diffusion-control of Fe and Co atoms from Fe–Co to Fe–Pt layers.