ORIENTATION OF THE NI MAGNETIC-MOMENTS IN NI-ZN FERRITES

We report the Ni L(2,3)-edges magnetic circular dichroism measurements of the ZnxNi1-xFe2O4 (x = 0.0, 0.26, 0.50, and 0.75) ferrimagnet. The Ni average magnetic moments were found to decrease significantly with increasing Zn content. This observation is interpreted in terms of th e Yafet-Kittel type canting of the Ni magnetic moment and shows values greater than those of the Fe magnetic moment determined from Mossbaue r and neutron diffraction measurements. This work provides new informa tion on the effect of Zn doping of Ni-O-Ni and Fe-O-Fe superexchange c ouplings.