Abstract
The photo-induced magnetic effect (PME) that the permeability changes in a Co-doped YNdIG single crystal film under the de applied field (Hdc) was measured at 77 K.
Three different states of permeability existed even for the PME measured in a single domain state under the de field. A simple model of the distribution of a-site Co2+ before and after irradiation with light suggested that the three different states may be attributed to differences in local magnetic anisotropy and a flopping of Co2+ parallel to the external dc field.
