Cu/Ni_<80>Fe_<20>/N(N=Cu,Cu/Pt)薄膜におけるFMR線幅とスピン拡散長(薄膜)

概要

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We have investigated the magnetic damping in two types of multilayer films, Cu(10 nm)/Ni_<80>Fe_<20>(3 nm)/Cu(d_<Cu>) and Cu(10 nm)/Ni_<80>Fe_<20>(3 nm)/Cu(d_<Cu>)/Pt(2 nm). Temperature dependence of the damping parameter and FMR linewidth with various Cu thickness d_<Cu> were measured. Spin diffusion length increased with decreasing temperature. We also measured the temperature dependence of FMR linewidth for the Cu/Ni_<80>Fe_<20>/Cu(d_<Cu>)/Pt films with d_<Cu>=400 nm, 800 nm. The increase of FMR linewidth with decreasing temperature suggested that the damping increased by spin diffusion in Cu layer.
2005-04-01