RKKY theory of oscillatory exchange coupling in the generalized random-phase approximation

The Singwi-Tosi-Land-Sjolander (STLS) version of the generalized random pha se approximation is used to calculate the exchange coupling between two fer romagnetic layers separated by a nonmagnetic transition-metal spacer. Expli cit numerical calculations for the spin-antisymmetric static local-field co rrection and spin-response function for palladium are presented. Taking int o account the static screening effect of s electrons on d holes of palladiu m the variation of the exchange coupling as a function of palladium thickne ss for the Fe/Pd/Fe trilayer system is determined. The results compared wit h experimental data show good consistency. [S0163-1829(99)02421-2].