For CoPt-C films, hysteresis magnetization calculations are performed on face-central- tetragonal (fct) CoPt inter-metal compound grains encapsulated in carbon with various grain sizes ranging from 4 nm to 6 nm and different distributions.

• 对包含fct结构CoPt的CoPt-C膜给出了300 K时平均颗粒尺寸从4 nm到6 nm；对应于不同尺寸分布下的磁滞回线.