Molecular magnetic dipole分子磁矩 There exist the elementary current lo resu 00p ting from electron spinning(E hE about their axes and revolving(轨道旋转) in orbits around nuclei, that is Molecular current 顺磁性物质:Pm≠0 Pm 抗磁性物质:P=0 Molecular magnetic dipoleMolecular magnetic dipole 分子磁矩 抗磁性物质： Pm =   顺磁性物质： pm    There exist the elementary current loops resulting from electron spinning（自旋） about their axes and revolving （轨道旋转）in orbits around nuclei, that is Molecular Current. m p  Molecular magnetic dipole