The result show that ZFS of the 4B1 state is linear to the slight magnetic interaction parameters, and ZFS of 2E state mainly depends on spin doublets.

• 结果表明，4B1态零场分裂与微小磁相互作用参量成线性关系，2E态零场分裂主要由二重态决定，磁相互作用和四角晶场对2E态零场分裂的贡献相比较，四角晶场的作用是主要的。