Analysis of the Paramagnetic Resonance and Optical Spectra of d3,7 Ions in Tetragonal Crystal Fields. I. Orbitally Nondegenerate Ground States

1968 ◽  
Vol 48 (1) ◽  
pp. 161-168 ◽  
Author(s):  
J. P. Jesson
Keyword(s):  
Ground States ◽  
Optical Spectra ◽  
Paramagnetic Resonance ◽  
Crystal Fields ◽  
Tetragonal Crystal

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.

Paramagnetic Resonance of theFe3+Ion in CaWO4(Strong Tetragonal Crystal Field)

1965 ◽  
Vol 138 (3A) ◽  
pp. A918-A924 ◽  
Author(s):  
R. W. Kedzie ◽  
D. H. Lyons ◽  
M. Kestigian
Keyword(s):  
Crystal Field ◽  
Paramagnetic Resonance ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Field

STUDIES OF THE OPTICAL SPECTRA AND EPR PARAMETERS FOR Dy3+ ION IN CaMoO4 CRYSTAL

2013 ◽  
Vol 27 (29) ◽  
pp. 1350209
Author(s):  
GUO-YA XIE ◽  
XIAN-RONG LIU
Keyword(s):  
Optical Spectra ◽  
Tetragonal Symmetry ◽  
Crystal Field Theory ◽  
Paramagnetic Resonance ◽  
Epr Parameters ◽  
Structure Constants ◽  
Experimental Values ◽  
Yellow Region ◽  
Electron Paramagnetic ◽  
Good Agreement

CaMoO 4: Dy 3+ used as solid-state laser single crystal, which operate in the yellow region, have important technological applications. In this paper, based on the crystal-field theory, the optical spectra of Dy 3+ in CaMoO 4 crystal are calculated by diagonalizing the 42 × 42 energy matrix. The electron paramagnetic resonance (EPR) parameters g factors g‖ and g⊥ and hyperfine structure constants A‖ and A⊥ of 161 Dy 3+ and 163 Dy 3+ isotopes in CaMoO 4 crystal are investigated using the perturbation formulas of the 4f9 ion in tetragonal symmetry. The needed crystal parameters are determined from the superposition model and the local structure of the studied system. The calculated results are in good agreement with the experimental values.

Theoretical investigations of the local distortion and spectral properties for VO2+ in SiO2 Glass

2017 ◽  
Vol 72 (12) ◽  
pp. 1139-1143 ◽  
Author(s):  
Mu-Neng Li ◽  
Zhi-Hong Zhang ◽  
Shao-Yi Wu
Keyword(s):  
Silica Matrix ◽  
Spin Hamiltonian ◽  
Local Distortion ◽  
Crystal Fields ◽  
Tetragonal Crystal ◽  
Theoretical Investigations ◽  
Structure Constants ◽  
Crystal Field Parameters ◽  
Hamiltonian Parameters ◽  
Tetragonal Crystal Field

AbstractThe local distortions and the spin Hamiltonian parameters g factors g∥, g⊥ and the hyperfine structure constants A∥ and A⊥ for isolated vanadyl ions VO2+ doped in SiO2 glass at 700°C are theoretically investigated from the perturbation formulas of these parameters for a 3d1 ion in tetragonally compressed octahedra. In these formulas, the relationships between local structure of VO2+ ions center and the tetragonal crystal field parameters are established. As a result, the distortion of the ligand octahedron is attributed to the strong axial crystal-fields associated with the short V4+–O2− bond due to the strong V=O bonding in the silica matrix. The theoretical spin Hamiltonian parameters obtained in this work show reasonable agreement with the experimental data.

Inhomogeneous broadening of electron-paramagnetic-resonance and optical spectra ofV4+inCaYAlO4

1995 ◽  
Vol 51 (6) ◽  
pp. 3438-3448 ◽  
Author(s):  
Mitsuo Yamaga ◽  
Brian Henderson ◽  
Taturu Yosida ◽  
Norihiro Kodama ◽  
Yuka Inoue
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Optical Spectra ◽  
Inhomogeneous Broadening ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic
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