HIGH-ENERGY PARAMAGNETIC SPIN FLUCTUATIONS IN NICKEL

The spin fluctuations with large wave vectors in paramagnetic nickel a bove T-c have been studied by means of computer calculations of the dy namical susceptibility. The spectral function and the cross section fo r neutron scattering have well-defined peaks that indicate the special character of the dynamics of 3d electrons in Ni. The peak has not, ho wever, resonance shape. The structure of spin excitations is determine d by critical spin dynamics as well as by electronic energy bands. [S0 163-1829(98)04837-1].