Theoretical studies of the g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7− superconductors

Alternative crystal field parameters for rare-earth ions obtained from various techniques: IV. Comparative analysis of crystal field parameters obtained from inelastic neutron scattering and related studies of RE ions (RE=Er3+, Ho3+, Nd3+, Pr3+) in REBa2Cu3O7−δ high-Tc superconductors

“…(4). The orthorhombic CFPs (Stevens) calculated by Wu and Dong [43] using SPM appear nearly fully rhombic (see Table 1a). These CFP values yielded agreement of the observed values of the g i factors for Er 3+ ions in ErBa 2 Cu 3 O 7Àd and the calculated ones (based on the perturbation formulas and the relevant adjustable SPM parameters).…”

“…(10). The CF Hamiltonian is written in [43] in terms of the Stevens operator equivalents in the same form as Eq. (4).…”