Abstract: Disclosed is a magneto-optical recording element comprising a dielectric layer and an amorphous perpendicular magnetization film on a substrate, wherein the perpendicular magnetization film is a perpendicular magnetization film comprising at least Gd element as the rare earth metal element and Fe metal as the transition metal component, in which the Fe sub-lattice moments are dominant, the dielectric layer is a dielectric layer composed of amorphous silicon nitride, the magnetization Ms of the perpendicular magnetization film is set within a range represented by the following formula (1):20 emu/cc.ltoreq.Ms.ltoreq.70 emu/cc (1)and the product of the magnetization Ms and the coercive force Hc is set within a range represented by the following formula (2):100 emu.multidot.KOe/cc.ltoreq.Ms.multidot.Hc.ltoreq.500 emu.multidot.

Abstract: In a magneto-optical recording element comprising a substrate, a magnetic layer and a dielectric layer, the dielectric layer is formed by deposition of a composition comprising Si.sub.3 N.sub.4 and a refractive index-improving agent such as Al.sub.2 O.sub.3 or Y.sub.2 O.sub.3. This dielectric layer has a high refractive index and the enhancement effect is improved. Moreover, this dielectric layer is excellent in the adhesion and resistance characteristics.

Abstract: In a magneto-optical recording element comprising a substrate, a magentic layer and a dielectric layer, the dielectric layer is formed by deposition of a composition comprising Si.sub.3 H.sub.4 and a refractive index-improving agent such as Al.sub.2 O.sub.3 or Y.sub.2 O.sub.3. This dielectric layer has a high refractive index and the enhancement effect is improved. Moreover, this dielectric layer is excellent in the adhesion and resistance characteristics.

Abstract: Disclosed is a magneto-optical recording element comprising a magnetic film composed of an alloy having a composition represented by the following formula:(Gd.sub.y Dy.sub.1-y).sub.x Fe.sub.1-x (0.15.ltoreq.x.ltoreq.0.35 and 0.30.ltoreq.y.ltoreq.0.95)This magnetic film is characterized in that the nuclear magnetic field, coercive force and saturation magnetic filed in the Kerr hysteresis loop are substantially same at temperatures higher than 100.degree. C.

Abstract: In a magneto-optical recording element comprising a substrate, a magnetic layer and a dielectric layer, the dielectric layer is formed by deposition of a composition comprising Si.sub.3 N.sub.4 and a refractive index-improving agent such as Al.sub.2 O.sub.3 or Y.sub.2 O.sub.3. This dielectric layer has a high refractive index and the enhancement effect is improved. Moreover, this dielectric layer is excellent in the adhesion and resistance characteristics.

Abstract: A recording medium suitable for use in a photo-thermo-magnetic memory of high density recording, including a substrate; a first magnetic layer, such as an amorphous TbFe film, which has a large coercive force and whose axis of easy magnetization is oriented in the direction perpendicular to the surface of the first layer; and a second magnetic layer, such as an amorphous GdTbCoFe film, having (i) a larger polar Kerr rotation or reflection than that of the first layer, (ii) the same polarity of polar Kerr rotation as that of the first layer, (iii) a direction of its magnetic moment aligned in parallel with that of the first layer and (iv) a thickness permitting the transmittance of a light, such as laser beam, therethrough and being magnetically coupled with the first layer by an exchange interaction therebetween; the first and second magnetic layers being superimposed on the substrate in that order or in the inverse order.