Department;
of;
Physics;
and;
Electronic;
Informational;
Engineering,;
Neijiang;
Teachers;
College,;
Neijiang;
641002,;
China;
Key;
laboratory;
of;
Nonferrous;
Metal;
Materials;
and;
New;
Processing;
Technology,;
Ministry;
of;
Education,;
Guangxi;
University,;
Nanning;
530004,;
China;
钴化合物; 磁热效应; 低磁场; X射线衍射; 二氧化碳; 居里温度; 磁相变; 磁化;