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Crystal Field Determination in Rare‐Earth Oxysulfides. II. Optical Experiments for Ho 3+ and Dy 3+ Ions
Author(s) -
RossatMignod J.,
Souillat J. C.,
Quezel G.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220620222
Subject(s) - ground state , excited state , atomic physics , ion , multiplet , luminescence , physics , crystal (programming language) , hamiltonian (control theory) , magnetic moment , crystal field theory , chemistry , crystallography , spectral line , condensed matter physics , optics , mathematical optimization , mathematics , astronomy , computer science , programming language , quantum mechanics
The crystal field levels of the 5 I 8 ground state manifold of Ho 3+ have been obtained from the luminescence spectrum of Y 2 O 2 S:5%Ho 3+ . The ground state of the Ho 3+ ion is found to be a set of five levels (0, 8, 14, 18, 23 cm −1 ). An attempt has been made to deduce the parameters of the CEF Hamiltonian from the experimental level energies. For Dy 3+ , the breaking up of the fundamental 6 H 15/2 multiplet has been obtained by analysing the fluorescence spectrum of Y 2 O 2 S:1% Dy 3+ and the absorption spectrum of Dy 2 O 2 S. The ground state is found to be a doublet relatively well separated (21 cm −1 ) from the first excited level. In these two compounds, CEF calculations give satisfactory agreement with both the value and direction of the magnetic moment obtained from neutron diffraction experiments.