Energy Level Scheme of Nd³⁺Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)

Abstract

The energy level schemes of the neodymium oxyhalides (NdOX, X = F, Cl, and Br) were studied and simulated with a phenomenological model accounting simultaneously for both the free ion interactions and the crystal fleld effect. The former included the electrostatic and interconfigurational interactions as well as the spin-orbit coupling. The simulations were carried out by using the data from the optical absorption and luminescence as well as the inelastic neutron scattering measured at low temperatures between 2.5 and 77 K. The values of the Slater integral F 2 describing the eJectrostatic interactions decrease while F 4 and F6 increase as a function of the ionic radius of the halide anion. The strength of the spin-orbit coupling is quite the same in all three matrices. The crystal field effect -measured as the crystal fleld strength parameter S -is almost twice as strong in the hexagonal NdOF matrix (650 cm -1 ) than in the tetragonal NdOCI or NdOBr (367 and 378 cm -1 , respectively). Similar evolution was obtained for the shortand mid-range crystal field strengths related to the spatial extension of the interaction.

Optical investigation of nanophosphor prepared by combustion and Pechini methods

“…The maximum number of the Stark components for Sm 3þ ion with 2Sþ1 L J state is ðJ þ 1=2Þ-manifold for any symmetry lower than cubic [24]. The spectroscopic investigations of the energy levels of Sm 3þ ion doped in different hosts have been reported [25,26].…”

Photoluminescence behavior of the Sm3+ and Tb3+ ions doped into the Gd2(WO4)3 matrix prepared by the Pechini and ceramic methods

“…17 For all 4f N configurations with odd N, the maximum number of the crystal field components for Kramer's ions with 2S+1 L J state is J+1/2 for any symmetry lower than cubic. 18 Generally, the Sm 3+ ion has only detectable absorption transitions below 500 nm, considering that the 6 H 5/2 → 6 P 3/2 transition (~ 400 nm) has the highest intensity, and consequently this rare earth ion displays a (pale) yellow color. 19 In the case of the Tb 3+ ion, the absorption spectra exhibit only weak bands from the .…”

Luminescence investigation of the Sm(III)-β-diketonates with sulfoxides, phosphine oxides and amides ligands

“…The trivalent samarium complexes were prepared by the method early described, for the compounds of europium ide, phosphine oxide and amide ligands in ethanol. The J11 / 2 for any symmetry lower than cubic [10]. The solutions were added in the molar ratio 1:2 (precursor 31 detailed analyses of the energy levels of Sm in several compound:ligand) and allowed to stand together until the hosts have been reported [11,12].…”