The spin dynamics between two ultrathin ferromagnetic layers exchange coupled via a nonmagnetic spacer is studied using in situ ferromagnetic resonance. The angular and the temperature dependence of the linewidth, especially the pronounced changes of the former, can be understood assuming the presence of an additional Gilbert damping resulting from the spin-current pumped through the interface between the ferromagnetic and nonmagnetic material or by considering the dynamic part of the interlayer exchange coupling. The competition between the Gilbert damping inherent in the ferromagnetic film and the Gilbert damping developed by the interface leads to an irregular behavior of the temperature dependence of the resonance linewidth for both the in-phase and out-of-phase precessing modes. It is shown that the oscillatory nature of the coupling is also revealed in the dependence of the resonance linewidth $\Delta H$ on the spacer thickness.

The $\mathrm{Ce}{\mathrm{Ni}}_4\mathrm{Al}$ compounds have been studied using the magnetic susceptibility, specific heat, electrical resistivity and x-ray photoemission spectroscopy (XPS) measurements. The XPS experiments were supported by the theoretical calculations employing the TB LMTO method. The estimation of the hybridization, $\Delta$, between the $f$-level and the conduction states was based on the XPS measurements of the $\mathrm{Ce}\left(3d\right)$ states and revealed a small value of $\Delta \approx 37\mathrm{meV}$ accompanied by a nearly full $f$-occupancy $(n_f\approx 0.88)$. The temperature measurements of the dc susceptibility have shown paramagnetic behavior fulfilling the Curie-Weiss law with ${\mu }_{\mathrm{eff}}=0.6{\mu }_{\mathrm{B}}∕\mathrm{f.u}$. Experimental values of the specific heat coefficient $\gamma =29{\mathrm{mJK}}^{-2}{\mathrm{mol}}^{-1}$ and the Debye temperature ${\theta }_D=315\mathrm{K}$ have been obtained. The electrical resistivity measurements revealed a presence of a minimum at about $16\mathrm{K}$.