Crystal-field analysis for RE3+ ions in laser materials: III. Energy levels for Nd3+ and Er3+ ions in LaAlO3, YAlO3, and LaGaO3 single crystals – Combined approach to low symmetry crystal field parameters

2012 ◽  
Vol 400 ◽  
pp. 29-38 ◽  
Author(s):  
M. Karbowiak ◽  
P. Gnutek ◽  
C. Rudowicz
Keyword(s):  
Single Crystals ◽  
Crystal Field ◽  
Energy Levels ◽  
Field Analysis ◽  
Combined Approach ◽  
Laser Materials ◽  
Crystal Field Parameters ◽  
Low Symmetry

scholarly journals Optical Spectroscopy of Li6Y(BO3)3 Single Crystals Doped with Dysprosium

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 503
Author(s):  
Éva Tichy-Rács ◽  
Ivo Romet ◽  
László Kovács ◽  
Krisztián Lengyel ◽  
Gábor Corradi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Optical Absorption ◽  
Single Crystals ◽  
Crystal Field ◽  
Excited States ◽  
Ground State ◽  
Energy Levels ◽  
Luminescence Spectroscopy ◽  
Wide Spectral Range ◽  
Low Symmetry

The energy levels of Dy3+ ions have been determined in lithium yttrium borate (Li6Y(BO3)3) single crystals in a wide spectral range between 3000 and 40,000 cm−1 using optical absorption and luminescence spectroscopy, which also allow for an analysis of the ground state. The crystal field splittings of the 6H15/2 ground state and all excited states up to the 4F7/2 manifold were obtained at a low temperature, based on luminescence (T = 4.2–78 K) and absorption (T = 8–100 K) measurements, respectively. The numbers of experimentally observed Stark sublevels are in agreement with those expected theoretically for Dy3+ ions occupying a single low symmetry (C1) site.

ON THE CRYSTAL FIELD ANALYSIS OFCr4+ENERGY LEVELS INRb2CrF6

2006 ◽  
Vol 20 (17) ◽  
pp. 1007-1014 ◽  
Author(s):  
M. G. BRIK
Keyword(s):  
Crystal Field ◽  
Energy Levels ◽  
Experimental Spectrum ◽  
Field Analysis ◽  
Crystal Field Theory ◽  
Crystal Field Strength ◽  
Charge Model ◽  
Exchange Charge Model ◽  
Racah Parameters ◽  
Crystal Field Parameters

Optical absorption spectrum of Cr4+ion in Rb2CrF6is analyzed using the exchange charge model of crystal field theory. The crystal field parameters acting on the optical electrons of Cr4+are calculated using the crystal structure data; a good agreement between the calculated and observed energy levels of Cr4+in the title host is demonstrated. The crystal field strength Dq=2159 cm-1and Racah parameters B=639 cm-1, C=3605 cm-1were evaluated from the experimental spectrum.

Ground configuration splitting in UCl5

1977 ◽  
Vol 55 (10) ◽  
pp. 937-942 ◽  
Author(s):  
A. F. Leung ◽  
Ying-Ming Poon
Keyword(s):  
Crystal Field ◽  
Energy Levels ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Constant ◽  
Point Charge Model ◽  
X Ray Crystallography ◽  
Charge Model ◽  
Crystal Field Parameters

The absorption spectra of UCl5 single crystal were observed in the region between 0.6 and 2.4 μm at room, 77, and 4.2 K temperatures. Five pure electronic transitions were assigned at 11 665, 9772, 8950, 6643, and 4300 cm−1. The energy levels associated with these transitions were identified as the splittings of the 5f1 ground configuration under the influence of the spin–orbit coupling and a crystal field of C2v symmetry. The number of crystal field parameters was reduced by assuming the point-charge model where the positions of the ions were determined by X-ray crystallography. Then, the crystal field parameters and the spin–orbit coupling constant were calculated to be [Formula: see text],[Formula: see text], [Formula: see text], and ξ = 1760 cm−1. The vibronic analysis showed that the 90, 200, and 320 cm−1 modes were similar to the T2u(v6), T1u(v4), and T1u(v3) of an UCl6− octahedron, respectively.

Spectroscopic studies and crystal-field analysis of U3+ ions in RbY2Cl7 single crystals

1997 ◽  
Vol 106 (8) ◽  
pp. 3067-3077 ◽  
Author(s):  
M. Karbowiak ◽  
J. Drozdzynski ◽  
K. M. Murdoch ◽  
N. M. Edelstein ◽  
S. Hubert
Keyword(s):  
Single Crystals ◽  
Crystal Field ◽  
Spectroscopic Studies ◽  
Field Analysis
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