Magnetic Fluctuation Scattering from Metallic Nickel above the Curie Temperature

The spectral distribution of the magnetic fluctuation scattering from metallic nickel has been studied above the Curie temperature with unpolarized and polarized neutrons. The present measurements confirm previous results of a spin-wave-like mode above $T_c$. It is shown however, that the main part of the magnetic scattering above $T_c$ does not come from the spin-wave ridge in ($\omega$, $\overrightarrow{\mathrm{q}}$) space but from a spectral part centered at zero energy with a broad energy distribution.