Comparative Study on Magnetoimpedance Effect in Laminating FeAlN Films With Nonferromagnetic and Ferromagnetic Layer

The laminating [FeAlN (50 nm)/NiFe or Cu (10 nm)]
₂₀
films were fabricated by magnetron sputtering method and the magnetoimpedance (MI) ratio of these films was measured. Results show that the MI ratio of the laminating FeAlN film with ferromagnetic Permalloy layer is enhanced by 50% more than that with nonferromagnetic copper. The enhancement of MI ratio is explained by exchange induced ripple reduction mechanism