HIGH-FREQUENCY MAGNETIC THIN FILM, COMPOSITE MAGNETIC THIN FILM, AND MAGNETIC DEVICE USING SAME

摘要

A high frequency magnetic thin film characterized by comprising a first layer made of a T-L composition (here, T is Fe or FeCo, and L is one or more of C, B, and N) and a second layer comprising a Co-based amorphous alloy arranged on either of the surfaces of the first layer. The high frequencymagnetic thin film is a multilayer film of a plurality of the first layers and a plurality of the second layers or desirably is a multilayer film of alternately laminated first and second layers. The high frequency magnetic thin film of the present invention exhibits the properties such that the real part ( mu ') of the complex permeability is 400 or more at 1 GHz, a quality factor Q (Q= mu '/ mu ") is 4 or more, and a saturation magnetization is 14 kG (1.4T) or more. <IMAGE>