Spectrum and Magnetic Properties of Hexagonal DyCl3

Abstract

The absorption and fluorescence spectra of anhydrous DyCl₃ were investigated and the levels up to 37 000 cm^—1 above the ground state established. Conclusive evidence is presented that the levels below 15 000 cm^—1 belong to the ⁶H and ⁶F multiplets. The Zeeman effects show considerable nonlinear interactions which follow quantitatively the existing theory. The 12 low levels and their electric and magnetic field splittings are reasonably well represented by the simplified theory with L‐S coupling, with the approximate crystal parameters B₂⁰=A₂⁰〈r²〉 =89.8 cm^—1, B₄⁰=—40.0 cm^—1, B₆⁰=—23.3 cm^—1, B₆⁶=253 cm^—1.