Abstract
By complementary measurements of magnetization. Hall resistivity ρH, and magnetic Kerr rotation θK, magnetic properties of amorphous Dy0.21Fe0.79 thin film with random (and coherent) anisotropy were investigated in several magnetic fields as a function of temperature. An irreversibility is observed below a certain temperature for ρH and θK as well as magnetization, and an anomalous negative magnetization and no changes of sign in ρH and θK are found near the compensation temperature. This latter seems to be a non-equilibrium phenomenon characteristic of ferrimagnet with both random anisotropy and compensation temperature.
