Magnetooptical properties of Ni-Co alloys and their natural visible and ir frequencies

The equatorial curve effect was measured in the visible and IR regions(0.15-3 eV) for Ni-Co alloys covering the entire composition range from pure Ni to pure Co. There is a discussion of the effect of the crystal structure of a ferromagnet on the position of the natural frequencies and the shape of the dispersion curve for the magnetooptical effect.