ZERO-FIELD SPLITTING AND G-FACTORS FOR D(2) IONS IN TRIGONALLY DISTORTED CUBIC-CRYSTAL FIELDS

By successively taking into account various interactions for d(2) ions in trigonally distorted cubic crystal fields, detailed analyses, deri vations and calculations of the zero-field splitting (ZFS) and g facto rs of the ground state have been carried out; and their physical essen tials and origins have been clearly revealed. The mistakes and shortco mings in some references have been corrected and improved. The calcula ted results are in excellent agreement with experimental data and much better than those of previous work. It is found that both the combine d action of the trigonal field and spin-orbit interaction and the inte raction between the ground state and excited states are quite necessar y for causing ZFS of the ground state, and both the spin-orbit interac tion and the admixture between the ground state and excited states are necessary for causing the deviation of g factors of the ground state from spin-only values.