Changes in the Magneto-Optical Spectra of Ni3Fe Films Caused by Heat Treatment

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