摘要
本文以~5B_2为基态,在强场图象下用微扰理论推导出了轴向零场分裂参量D的1到4阶微扰计算公式(~5D近似),并就公式的微扰收敛性进行了系统的讨论.通过计算和分析表明,当第一激发态靠近基态使得其能量与旋轨耦合常数ζ可比拟时.微扰公式是发散的.这时,微扰近似方法将不再有效。但在大多数情况下,公式保持有较好的收敛性.同时,给出了使微扰松式有效的晶场参量D_9、δ和μ的近似取值范围,为~5D近似公式的应用提供了有价值的参考。
In this paper.for ̄5B_2ground state.the perturbation formulas up to four order of the axial ZFS D are derived using the perturbation Loop method in strong-filed scheme with ̄5D approximation, and investigating the convergence of this formulas is done. The results show that the perturbation formulas are divergent when the first excited state closes to the ground state ̄5B_2. By a set of numerical calculation and analysis,the rang of crystal field parameters D_q,δand μ.in which the perturbation formulas are valid.are also given.This renders the appliance of the perturbation formulas of ̄5D approximation a valuable reference.
出处
《四川师范大学学报(自然科学版)》
CAS
CSCD
1994年第1期62-67,共6页
Journal of Sichuan Normal University(Natural Science)
关键词
ZFS
收敛性
微扰公式
金属
晶体
ZFS,3d ̄nions,tetragonal,perturbation convergence