Transverse magnetooptic effects in Ni-Fe films

This paper describes measurements of the transverse Kerr effect in Ni-Fe films. These measurements were made in the study of the magnetooptic effects over the wavelength range 0.3 to 3 μ. The quantity measured was the relative reflectivity which is the ratio of a change in reflectance due to the variation of the transverse magnetization divided by the Fresnel reflectivity. Data are presented which show the variation of this quantity as a function of the composition of iron-nickel alloys and for given alloys as a function of wavelength. These data show that in the 0.3- to 3-μ wavelength range relative reflectivities between
\pm 3.5 \times 10^{-3}
have been obtained.