To provide a magnetic semiconductor device that is lattice-matched with a substrate and forms a quantum well layer or a ferromagnetic electrode constituted from II-IV-V_2 group compound magnetic semiconductor material whose Curie temperature Tc is the room temperature. 基板と格子整合し、キュリー温度Tcが室温であるII−IV−V_2族化合物磁性半導体材料で量子井戸層あるいは強磁性電極を構成した磁性半導体素子を提供する。 - 特許庁