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Crystal Field Determination in Rare‐Earth Oxysulfides. I. Optical Experiments for Tb 3+ Ion
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.2220620123
Subject(s) - ion , ground state , hamiltonian (control theory) , rare earth , magnetization , magnetic moment , chemistry , crystal (programming language) , physics , neutron diffraction , crystallography , condensed matter physics , atomic physics , crystal structure , magnetic field , mineralogy , quantum mechanics , mathematics , mathematical optimization , computer science , programming language
The crystalline electric field (CEF) acting on a Tb 3+ ion in rare‐earth oxysulfides has been determined. By analysing fluorescence spectra of Y 2 O 2 S: 1% Tb 3+ , it is possible to obtain the energy levels of the 7 F J ( J = 1 to 6) manifolds of Tb 3+ in this host and therefore the CEF Hamiltonian of C 3v symmetry. In order to explain the particular magnetization processes in Tb 2 O 2 S, particular attention has been paid to the ground state. It has been found that the ground state consists of four levels lying very close one another (0, 6, 15, 26 cm −1 ). Both the direction and the value of the magnetic moment calculated according to this level scheme agree well with neutron diffraction data.