A scalar crystal field strength parameter for rare-earth ions : meaning and usefulness

1983 ◽  
Vol 44 (2) ◽  
pp. 201-206 ◽  
Author(s):  
F. Auzel ◽  
O.L. Malta
Keyword(s):  
Rare Earth ◽  
Field Strength ◽  
Crystal Field ◽  
Rare Earth Ions ◽  
Strength Parameter ◽  
Crystal Field Strength

The crystal field strength parameter and the maximum splitting of the 7F1 manifold of the Eu3+ ion in oxides

1995 ◽  
Vol 228 (1) ◽  
pp. 41-44 ◽  
Author(s):  
O.L. Malta ◽  
E. Antic-Fidancev ◽  
M. Lemaitre-Blaise ◽  
A. Milicic-Tang ◽  
M. Taibi
Keyword(s):  
Field Strength ◽  
Crystal Field ◽  
Strength Parameter ◽  
Crystal Field Strength

Crystal field strength in C-type cubic rare earth oxides

2002 ◽  
Vol 341 (1-2) ◽  
pp. 82-86 ◽  
Author(s):  
Elisabeth Antic-Fidancev ◽  
Jorma Hölsä ◽  
Mika Lastusaari
Keyword(s):  
Rare Earth ◽  
Field Strength ◽  
Crystal Field ◽  
Rare Earth Oxides ◽  
Crystal Field Strength

scholarly journals Lattice Location of Rare Earth Ions in Semiconductors: Interpretation and Limitations of Using g Values

2005 ◽  
Vol 866 ◽  
Author(s):  
David Carey
Keyword(s):  
Rare Earth ◽  
Crystal Field ◽  
Field Potential ◽  
Rare Earth Ions ◽  
Lattice Location ◽  
Paramagnetic Resonance ◽  
Cubic Symmetry ◽  
Crystal Fields ◽  
Valid Comparison ◽  
G Value

AbstractThe g values of rare earth ions obtained from either paramagnetic resonance or Zeeman measurements are often used to interpret the location and/or environment surrounding rare earth ions. In the case of centres with cubic symmetry the g value can be used to distinguish between substitutional and interstitial sites. For centres with less than cubic symmetry the average g value, taken as 1/3 trace of the g tensor, is often used as an indication of the lattice location and/or a measure of the strength of the local crystal field. This approach is widely used but is based on the assumption that the non-cubic terms in the total crystal field potential are small compared with the cubic crystal field. In this paper we have explored this assumption by calculating the principal g values in axial crystal fields for the Er3+ ion. We examine the limits over which the average g value approach is valid. Comparison is made with published results.

scholarly journals Luminescence properties of Ce3+ and Eu2+ in fluorites and apatites

Mineralogia ◽  
2009 ◽  
Vol 40 (1-4) ◽  
pp. 85-94 ◽  
Author(s):  
Sabina Bodył
Keyword(s):  
Field Strength ◽  
Crystal Field ◽  
Luminescence Properties ◽  
Luminescence Spectra ◽  
Low Concentration ◽  
Crystal Field Strength

Luminescence properties of Ce3+ and Eu2+ in fluorites and apatitesNatural samples of fluorite and apatite from granites, pegmatites, carbonatites and andesitic tuffs were investigated by steady-time spectroscopy to characterize the luminescence properties of Ce3+ and Eu2+. The luminescence of Ce3+ has been clearly seen in fluorite as 320 and 337 or 343 nm bands. In apatites, two distinct bands for two different Ca crystal sites were obtained: 340-380 nm for Ca(1) and 420-450 nm for Ca(2). The luminescence spectra of Eu2+ in the fluorite crystals were measured even at for low concentration of this element (0.11 ppm). For Ce3+, it has been showed that the crystal field strength depends more on the nature of the ligand than on the Me-ligand distances.

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