Tuning of the microwave magnetization dynamics in Fe65Co35-based thin films by Dy Doping

The tuning of the microwave characteristics of soft magnetic metallic thin films, especially the anisotropy field and the damping mechanism, is an important issue in their high-frequency dynamics of soft magnetic thin films. the ways to change the damping parameter are doping some non-magnetic compositions or diluting the ferromagnetic thin films with transition metal elements, material. Another choice is to take advantage of the exchange bias or exchange-coupling interactions between multilayers. Besides, Fe-Co alloys have been intensively investigated because of their very high saturation flux density. Sputter deposited Fe-Co films, however, generally show high coercivity and they are therefore not applicable as the write pole materials in a magnetic recording head. This work, we tuned the microwave magnetization dynamics Fe65Co35-based thin films by Dy Doping.