Calculations of the Spectra of SrF2:Gd3+in a Tetragonal Crystal Field

1971 ◽  
Vol 3 (11) ◽  
pp. 3603-3607 ◽  
Author(s):  
J. M. O'Hare
Keyword(s):  
Crystal Field ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Field

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

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.

INVESTIGATIONS ON THE EPR g FACTORS FOR THE SIX-COORDIANTED Cu2+(1) SITE IN YBa2Cu3O6+x

2007 ◽  
Vol 21 (18n19) ◽  
pp. 3250-3253 ◽  
Author(s):  
S. Y. WU ◽  
J. S. YAO ◽  
H. M. ZHANG ◽  
G. D. LU
Keyword(s):  
Structural Data ◽  
Teller Effect ◽  
Tetragonal Crystal ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Crystal Field Parameters ◽  
Tetragonal Crystal Field ◽  
Theoretical Results ◽  
Good Agreement ◽  
G Factors

The EPR g factors g // and g ⊥ for the six-coordinated Cu 2+(1) site in YBa 2 Cu 3 O 6+x are theoretically investigated from the perturbation formulas for a 3 d 9 ion in tetragonally elongated octahedra. The related tetragonal crystal-field parameters Ds and Dt are determined from the superposition model and the structural data for the Cu 2+(1) site, by considering the effective elongation of the oxygen octahedron due to the Jahn-Teller effect of the Cu 2+ cluster. Based on the calculations, the effective elongation (≈ 15%) of the ligand octahedron is obtained for the signals at 100K. As for the EPR signals at room temperature, the elongation declines to merely 4%, corresponding to the smaller anisotropy Δ g (= g // - g ⊥). The theoretical results for the g factors are in good agreement with the observed values, and the local tetragonal distortion due to the Jahn-Teller effect is discussed.

LOW SYMMETRY CRYSTAL FIELD IN LITHIUM SPINEL

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-847-C1-849
Author(s):  
M. P. PIETROV ◽  
H. SZYMCZAK ◽  
R. WADAS ◽  
W. WARDZYNSKI
Keyword(s):  
Crystal Field ◽  
Low Symmetry

Determination of exchange and crystal field effects in Sm alloys by polarized neutron diffraction

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-180-C5-182 ◽  
Author(s):  
J. X. Boucherle ◽  
D. Givord ◽  
J. Laforest ◽  
J. Schweizer ◽  
F. Tasset
Keyword(s):  
Neutron Diffraction ◽  
Crystal Field ◽  
Field Effects ◽  
Polarized Neutron
Sign in / Sign up

Export Citation Format

Share Document