Static and dynamic magnetic properties of (CoZr)100−x(RE)x amorphous thin films

Abstract
The saturation magnetization, uniaxial anisotropy, and the dynamical magnetic properties of amorphous (Co92Zr8)100−x(RE)x thin films have been studied for various magnetic rare earths and for 0≤x≤3. The films were rf sputtered in presence of a dc magnetic field applied parallel to the film plane. For RE=Nd, Pr, Dy, and Tb, the films exhibit an in‐plane uniaxial anisotropy Ku, the magnitude of Ku being related to the particular RE. When RE=Gd and Sm a biaxial anisotropy develops constituted by a Ku and a perpendicular anisotropy Kp. The resonance linewidth as a function of x and RE is also reported.