Abstract
The magneto-optical spectra (σxx and ωσxy) were investigated in the photon energy range of 1.2 to 4.6 eV for Ni3Fe thin hlms before and after heat treatment. It was found that both spectra changed dramatically as a result of the heat treatment. The σxx and ωσxy spectra of Ni3Fe thin films were reduced by the transition from disorder toorder. The joint density of states for both ordered and disordered states of Ni3Fe were also calculated, and compared with the experimental data.