Abstract: If the Curie points of the first magnetic layer, second magnetic layer, third magnetic layer and fourth magnetic layer of alloys of rare-earth metal and transition metal as ferrimagnetic materials showing perpendicular magnetization from room temperature to their Curie points are indicated as Tc1, Tc2, Tc3 and Tc4, respectively, the Curie points and room temperature are related by: room temperature<Tc3<Tc4<Tc1<Tc2. If the sublattice magnetization of transition metal is indicated as .alpha. and the sublattice magnetization of rare-earth metal is .beta., .alpha. is stronger than .beta. in the second magnetic layer at temperatures between Tc1 and Tc2, and .beta. is stronger than .alpha. in the fourth magnetic layer at temperatures between room temperature and Tc4.