Investigations of the optical spectra and spin-Hamiltonian parameters for the rhombic Yb3+ centers in garnets

A probe of the radiation field magnetic component based on octahedral Yb3+ in the CaNbGa garnet – CNGG – single crystal

“…While efforts have been made in the assignment of usually experimentally incomplete Yb 3+ energy level sets both for C 2 and C 3i Yb centers of cubic sesquioxides, 38,39 mainly through the application of the barycenter plot law, 34 only CF analyses of 24c dodecahedral Yb 3+ energy levels have been attempted for garnet hosts. 40,41 These previously known data for cubic sesquioxides indicate that CF splittings of 2 F 7/2 and 2 F 5/2 are always wider and their corresponding barycenters are located at higher energies for centrosymmetric C 3i Yb 3+ centers than for the C 2 ones, see Table 2 in ref. 38 and the ESI † (Table S1).…”