Comparison of the spectra and dynamics of Er sup 3+ :Y sub 2-x Sc sub x O sub 3 (x = 0,1,2)
- Georgia Univ., Athens, GA (USA). Dept. of Physics and Astronomy
- Los Alamos National Lab., NM (USA)
We have studied the spectra and lifetimes of Er{sup 3+} in the isostructural series, Y{sub 2}O{sub 3}, YScO{sub 3}, and Sc{sub 2}O{sub 3}. Addition of Sc{sup 3+} to Er{sup 3+}:Y{sub 2}O{sub 3} shifted the energy level positions, changed the inhomogeneous broadening and shortened the fluorescence lifetimes for Er{sup 3+} in the C{sub 2} site. Going from Er{sup 3+}:Y{sub 2}O{sub 3} to Er{sup 3+}:Sc{sub 2}O{sub 3} increased the barycenter of the four lowest J-multiplets, decreased the barycenter of the {sup 4}F{sub 9/2} and higher multiplets, and increased the crystal-field splitting within each J-multiplet. The inhomogeneous linewidths in the Er{sup 3+}:YScO{sub 3} spectra were much larger than in Er{sup 3+}:Y{sub 2}O{sub 3} or Er{sup 3+}:Sc{sub 2}O{sub 3} due to random substitutional disorder in the mixed system. The random disorder in Er{sup 3+}:YScO{sub 3} removed the inversion symmetry of the C{sub 3i} lattice site and allowed observation of transitions from Er{sup 3+} ions in this site. All fluorescence lifetimes decreased with addition of Sc{sup 3+} indicating an increase in the nonradiative relaxation. 13 refs., 3 figs., 3 tabs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/MA
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6880227
- Report Number(s):
- LA-UR-90-1962; CONF-9007116--1; ON: DE90013180
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL STRUCTURE
ENERGY LEVELS
ERBIUM IONS
EXCITED STATES
FLUORESCENCE
IONS
LUMINESCENCE
OXIDES
OXYGEN COMPOUNDS
SCANDIUM COMPOUNDS
SCANDIUM OXIDES
SPECTRA
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES