Crystal field in rare-earth fluorides—III. Analysis of experimental data for the alkaline earth fluorides

1971 ◽  
Vol 32 (8) ◽  
pp. 2001-2006 ◽  
Author(s):  
G.E. Stedman ◽  
D.J. Newman
Keyword(s):  
Experimental Data ◽  
Rare Earth ◽  
Crystal Field ◽  
Alkaline Earth ◽  
Rare Earth Fluorides

scholarly journals Calculation Of The Crystal Field Parameters For Eu3+ Doped In SrAl2O4 And SrIn2O4 Spinels

2012 ◽  
Vol 56 (1) ◽  
pp. 132-138
Author(s):  
M. L. Stanciu
Keyword(s):  
Experimental Data ◽  
Rare Earth ◽  
Crystal Field ◽  
Energy Levels ◽  
Superposition Model ◽  
Strontium Aluminate ◽  
Intrinsic Parameters ◽  
Broadband Emission ◽  
Host Materials ◽  
Crystal Field Parameters

AbstractStrontium aluminate (SrAl2O4) and the indium aluminate (SrIn2O4) spinels have been proven to be efficient host materials, which offer the possibility of generating broadband emission after doping with rare earth trivalent ions. The present work is devoted to the calculation of the crystal field parameters and the energy levels of the trivalent europium doped in SrAl2O4 and SrIn2O4 spinels, using the superposition model of the crystal field. Using the intrinsic parameters for Eu3+-O2− bonds, and the geometry structure of the each crystal, we modeled the CFPs and simulated the low-lying energy levels schemes. The obtained results are compared with the experimental data and discussed.

scholarly journals NMR parameters in alkali, alkaline earth and rare earth fluorides from first principle calculations

2011 ◽  
Vol 13 (41) ◽  
pp. 18539 ◽  
Author(s):  
Aymeric Sadoc ◽  
Monique Body ◽  
Christophe Legein ◽  
Mamata Biswal ◽  
Franck Fayon ◽  
...  
Keyword(s):  
Rare Earth ◽  
Alkaline Earth ◽  
First Principle ◽  
First Principle Calculations ◽  
Nmr Parameters ◽  
Rare Earth Fluorides

Characterization of Rare-Earth Fluoride Anti-Stokes Phosphors by Scanning arid Transmission Electron Microscopy

1971 ◽  
Vol 29 ◽  
pp. 142-143
Author(s):  
N. M. P. Low ◽  
L. E. Brosselard
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Elevated Temperatures ◽  
Stoichiometric Composition ◽  
Rare Earth Ions ◽  
Crystalline Solid ◽  
Precipitation Process ◽  
Rare Earth Fluoride ◽  
Earth Fluoride ◽  
Rare Earth Fluorides

There has been considerable interest over the past several years in materials capable of converting infrared radiation to visible light by means of sequential excitation in two or more steps. Several rare-earth trifluorides (LaF3, YF3, GdF3, and LuF3) containing a small amount of other trivalent rare-earth ions (Yb3+ and Er3+, or Ho3+, or Tm3+) have been found to exhibit such phenomenon. The methods of preparation of these rare-earth fluorides in the crystalline solid form generally involve a co-precipitation process and a subsequent solid state reaction at elevated temperatures. This investigation was undertaken to examine the morphological features of both the precipitated and the thermally treated fluoride powders by both transmission and scanning electron microscopy.Rare-earth oxides of stoichiometric composition were dissolved in nitric acid and the mixed rare-earth fluoride was then coprecipitated out as fine granules by the addition of excess hydrofluoric acid. The precipitated rare-earth fluorides were washed with water, separated from the aqueous solution, and oven-dried.

CRYSTAL-FIELD DEPENDENCE OF THE MAGNETIC LINEAR BIREFRINGENCE IN PARAMAGNETIC RARE-EARTH GARNETS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-955-C8-956 ◽  
Author(s):  
N. P. Kolmakova ◽  
R. Z. Levitin ◽  
A. I. Popov ◽  
N. F. Vedernikov ◽  
A. K. Zvezdin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Field ◽  
Field Dependence ◽  
Linear Birefringence
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