Magneto concentration dependence

The temperature dependence of the Faraday and Kerr rotation in a number of amorphous Gd1 xFex alloys was studied by Hartmann (1982). Results obtained for the latter alloys are reproduced in fig. 53. These results have to be compared with the temperature dependence of the magnetization shown for Gd0 2Fe0 8 in fig. 52. It follows from the results of Hartmann that all the Gdt xFex alloys shown in fig. 53 have a compensation temperature, which decreases with increasing Fe concentration. However, no such features are seen in the magneto-optical effect in the sample is merely due to one of the two sublattice magnetizations. In accordance with this feature is the observation by means of hysteresis loops at temperatures above Tcomp but inverted types of hysteresis loops at temperatures... 

In another paper Paparoditis et Suryanarayanan (1972) have reported the magneto-optical properties of thin films codeposited on heated substrates (67(1-770 K). They have shown that the properties depend especially on the Se concentration. Suryanarayanan et al. (1974) have studied YbTe films in more detail by optical absorption and magnetic circular dichroism. They proposed an energy level diagram, and concluded that the f-levels of ytterbium are located between the valence and conduction bands. These optical properties can be linked to a S.C.-M.-type transition, like the one observed at high pressures (150-190 kbar). 

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