Fe-Co合金の多層化による磁歪の制御

抄録

The bcc Fe₇₀Co₃₀ alloy has a high saturation magnetization and a large positive magnetostriction value, whereas the fcc Ni₇₅Co₂₅ alloy has a large negative magnetostriction value. This paper reports on a systematical investigation into the magnetic properties of FeCo/NiCo multilayer films. Magnetostriction in a FeCo/NiCo film becomes smaller as the ratio of the thickness of the NiCo layer to that of the FeCo/NiCo film increases. The film (3/7 nm) has a saturation magnetization of 120 emu/n and a coercivity of 1.7 Oe, with nearly zero magnetostriction.