Energy Level Scheme of Nd^{3+} Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)

• Authors: L. Beaury , J. Hölsä , J. Korventausta , J. Krupa , R. Lamminmäki , P. Porcher , H. Rahiala , E. Säilynoja
• Languages of publication: EN

Abstracts

EN

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 field 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 electrostatic interactions decrease while F^{4} and F^{6} 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 field 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 short-and mid-range crystal field strengths related to the spatial extension of the interaction.

Keywords

EN

71.55.-i; 71.70.Ch; 78.40.-q; 78.55.-m

Discipline

• 71.70.Ch: Crystal and ligand fields
• 78.55.-m: Photoluminescence, properties and materials(for time resolved luminescence, see 78.47.jd)
• 78.40.-q: Absorption and reflection spectra: visible and ultraviolet(for infrared spectra, see 78.30.-j; for optical spectra of superconductors, see 74.25.nd; for time resolved reflection spectroscopy, see 78.47.jg; for multiphoton absorption, see 79.20.Ws in impact phenomena)
• 71.55.-i: Impurity and defect levels

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 6
• Pages: 1203-1213

Dates

published

1996-12

received

1996-06-24

Contributors

author

L. Beaury

• C.N.R.S., U.P.R. 209, F-92195 Meudon, France

author

J. Hölsä

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

author

J. Korventausta

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

author

J. Krupa

• I.P.N., Laboratoire de Radiochimie, F-91406 Orsay, France

author

R. Lamminmäki

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

author

P. Porcher

• C.N.R.S., U.P.R. 209, F-92195 Meudon, France

author

H. Rahiala

• Åbo Akademi University, Department of Chemistry, FIN-20500 Turku, Finland

author

E. Säilynoja

• University of Turku, Department of Chemistry, FIN-20014 Turku, Finland

Identifiers

DOI

10.12693/APhysPolA.90.1203