Coupling effects between PtMnSb and TbFe films with a double-layered structure have been investigated to improve the magnetic and magneto-optical properties of PtMnSb film with in-plane magnetization. A weak exchange-coup!ing was recognized for a PtMnSb/TbFe double-layered film inowhich a very thin PtMnSb layer (~200A thick) was combined with thick amorphous Tb Fe layer (~6000A thick). The coercive force Hc of the structure increased up to 6300e, which was five times as large as a PtMnSb film.

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... he polar Kerr rotation loop of double-layered structure could be explained in terms of an exchange coupling model.