MAGNETIC-PROPERTIES OF PD CO MULTILAYER FILMS STUDIED BY HALL-EFFECT/

The magnetic properties and Hall effects of Pd/Co multilayer films fab ricated by thermal evaporation have been studied using the Hall hyster esis loop measurement. The polarity of the Hall hysteresis loops of Pd /Co multilayer changed between 4 and 5 monolayers (ML) of Pd. It was s peculated that the reason for this phenomena is the change of the posi tion of Fermi level of 3d band in Pd/1Co multilayer from lower half of the band to upper half of the band depending on the Pd thickness. The Hall resistivities as a function of Pd thickness were found to oscill ate and the period of oscillation was about 5 ML of Pd. The change of saturation magnetization as a function of Pd thickness reflected the o scillatory behavior up to 7 ML of Pd and the enhanced Co moments were observed in the film with 4 or thicker ML of Pd.