作者单位: | [1]DepartmentofPhysics,LuoyangTeacher'sCollege,471022,Luoyang,PRC [2]DepartmentofPhysics,NanjingUniversity,Nanjing210008andStateKeyLaboratoryofMagnetism,lnstiuteofPhysics,ChineseAeademyofSicences.,100080,Beijing,PRC [3]DepartmentofPhysics,ZaoghungTeacher'sCollege,277160,Zaoghuang,PRC |