STATIC AND DYNAMIC MAGNETIC-PROPERTIES OF (COZR)100-X(RE)X AMORPHOUS THIN-FILMS

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 Th, the films exhibit an in-plane uniaxial anisotropy K(u), the magnitude of K(u) being related to the particular RE. When RE=Gd and Sm a biaxial anisotropy develops constituted by a K(u) and a perpendicular anisotropy K(p). The resonance linewidth as a function of x and RE is also reported.