The magnetic properties of rf sputtered amorphous (Co93Zr7)100−xTbx thin films were investigated as a function of Tb content for 0≤x≤2 by transverse biased initial susceptibility measurements. The deposition was performed in a magnetic field. This films exhibit a very well-defined in-plane anisotropy with negligible long-range fluctuations and a small coercive field Hc, in accordance with the experimental data. The overall variations of the transverse susceptibility are related to the ripple, and the variations of the structure factor S with composition was measured. The local anisotropy Kloc, deduced from S, increases with the increasing amount of Tb in the layers. The results are discussed in terms of the single-ion anisotropy of the rare earth.

No abstract

Frequency and field dependence of magnetoelectric interactions in layered ferromagnetic transition metalpiezoelectric lead zirconate titanate Appl. Phys. Lett. 87, 222507 (2005); 10.1063/1.2137450 Fluctuation field and time dependence of magnetization in TbFeCo amorphous rare earth-transition metal thin films for perpendicular magnetic recording A study of complex permeability in rare earthsubstituted cobalt/nonmagnetic transition metal amorphous thin films J. Appl. Phys. 73, 5592 (1993); 10.1063/1.353661 Microstructure and magnetism in amorphous rare earth-transition metal thin films

No abstract

The saturation magnetization, uniaxial anisotropy, and the dynamical magnetic properties of amorphous ( Co,,Zrs j loo.. .~ (RE), thin films have been studied for various magnetic rare earths and for 0

By using radio-frequency (rf) sputtering, amorphous ferromagnetic thin films of composition (Co93Zr7)100−yREy (RE=Nd, Pr, Dy, Tb, Gd, or Sm: magnetic rare earth elements) have been prepared. This work was performed for small amounts of RE substitution (y<3). These films exhibit static soft magnetic properties similar to CoZr alloys. For all compositions studied, a low in-plane uniaxial anisotropy Hk appears, whose magnitude depends upon composition and preparation parameters. Above a critical substitution level, a biaxial anisotropy exhibiting an in-plane Hk and a perpendicular component Hp is measured for films containing Gd or Sm. The substitution by RE atoms essentially affects the frequency-response shape of complex permeability, depending on nature, concentration of RE atoms and on values of both Hk and Hp. High-frequency permeability spectra could be well fitted by a theoretical model based on magnetization changes due to rotation, using a composition-dependent Landau–Lifshitz damping term. The results on films exhibiting uniaxial or biaxial anisotropy are reported and discussed.

No abstract

No abstract