Abstract
Magnetization and Faraday rotation measurements at 1150 nm have been performed on Eu/sub 3/Fe/sub 5-z/Ga/sub z/O/sub 12/ single crystals (0<or=z<0.9) quenched at two temperatures, T/sub q/=1200 and 1473 K, as a function of temperature and magnetic field. The heat treatments, which have a greater influence on magnetization than Faraday rotation, shift the magnetic compensation temperature towards lower T when T/sub q/ increases. The magnetization results are interpreted on the basis of an induced moment of Eu/sup 3+/ in agreement with W.P. Wolf and J.H. Van Vleck, and G.F. Dionne's model of ferrimagnetic garnets, assuming that the distribution of Ga on the different sites is the same as YIG:Ga crystals. The contribution of Eu to Faraday rotation in EuIG shows that the gyroelectric magnetooptical coefficient of the model of W.A. Crossley et al., is a linear function of temperature for T>50 K (g/sub Eu/ constant).<<ETX>>
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