Abstract-In this paper, the temperature dependence of magnetic and magneto-optic (MO) properties of light rare earth (LRE)-heavy rare earth (HRE)-FeCo / HRE-FeCo has been investigated. The shapes of Kerr hysteresis loops were lead to great changes as temperature varied. The Kerr angles of couple-bilayeredfilms were shown different decreasing tendency as compared to those of single-layered films when temperature was increased. It was found that the exchange-coupled action has a profundly contribution to Kerr angles through the temperature range(-30 0 -1 lOt).
The magnetic interaction of magneto-optical multilayer films have been analyzed using the stress mechanism of coercivity and the single ion model of magnetic anisotropy. The relation between the magnetic properties of the multilayer films and the dielectric film thickness has been explained.
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