Model calculation of dynamical spin susceptibility of paramagnetic nickel

摘要: The dynamical spin susceptibility of paramagnetic nickel is investigated using a noninteracting isotropic band model based on the energy-band calculations Hanus. free-electron wave function and simple tightbinding functions are used for $s$ $d$ conduction electrons, respectively. Explicit expressions obtained intraband interband parts function. Numerical computations carried out atomic configuration ${(3d)}^{9.4}{(4s)}^{0.6}$ field vector $\stackrel{\ensuremath{\rightarrow}}{\mathrm{q}}$ along [100] direction energy-transfer range 0.01-0.4 eV. compared part found to be dominating. exchange enhancement also studied results with other existing theoretical experimental measurements. agreement reasonably good.