Optical spectroscopy of Ca3Sc2Ge3O12:Ni2+

Zannoni, E.; Cavalli, Enrico; Toncelli, A.; Tonelli, M.; Bettinelli, Marco

doi:10.1016/s0022-3697(98)00314-x

Cited by 81 publications

(88 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Obtained values of CFPs were used to diagonalize the crystal field Hamiltonian (1) in the space spanned by all 25 wave functions of 5 LS terms of Ni 2+ ( 3 P, 3 F, 1 S, 1 D, 1 G). Spin-orbit interaction was not considered, since the absorption bands in the experimental spectra are broad and no fine structure is observed.…”

Section: Results Of Calculations and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Brik

Avram

2008

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

show abstract

Section: Results Of Calculations and Discussionmentioning

confidence: 99%

“…After doping, Ni 2+ ions may occupy both octahedral and tetrahedral sites [1][2][3]. Numerous studies of various aspects related to the Ni 2+ -doped crystals can be found in the literature [4-24; this list of references is rather representative].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Brik

Avram

2008

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

show abstract

“…As a rule, divalent nickel enters octahedral sites in crystals, though in some garnets like Gd 3 Ga 5 O 12 [1,2] and Ca 3 Sc 2 Ge 3 O 12 (CaSGG) [3] tetrahedrally coordinated Ni 2+ ions were detected as well resulting in more complicated spectra due to the overlap of the absorption bands arising from different centers. The emission lifetime of octahedral Ni 2+ ions is of the order of ms [1] and from the point of view of the potential laser application the Ni…”

Section: +mentioning

confidence: 99%

“…Paper torted octahedral Sc 3+ sites (C 3i point symmetry) and with reduced probability distorted tetrahedral Ge 4+ sites (S 4 point symmetry) [3]. The Ni 2+ -O 2-distance is 2.095 Å for the octahedral positions and 1.762 Å for the tetrahedral ones [6].…”

Section: Originalmentioning

confidence: 99%

Fully relativistic analysis of the absorption spectra of Ca₃Sc₂Ge₃O₁₂:Ni²⁺

Brik¹,

Ogasawara

2006

Physica Status Solidi (b)

View full text Add to dashboard Cite

Systematic analysis of the energy level schemes, ground state absorption (GSA) and covalency effects for the Ni 2+ ion in Ca 3 Sc 2 Ge 3 O 12 was performed. The recently developed first-principles approach to the analysis of the absorption spectra of impurity ions in crystals based on the discrete variational multi-electron method (DV-ME) [K. Ogasawara et al., Phys. Rev. B 64, 115413 (2001)] was used in the calculations. As a result, complete energy level schemes of Ni 2+ and its absorption spectra at both possible crystallographic positions (distorted octahedral Sc 3+ and tetrahedral Ge 4+ positions) were calculated, assigned and compared with experimental data. Energies of the charge transfer (CT) transitions for both positions are estimated. Numerical contributions of all possible electron configurations into the calculated energy states were determined. By performing analysis of the molecular orbitals (MO) population, it was shown that the covalency of the chemical bonds between the Ni 2+ and O 2-ions increases in passing from the hexa-to the tetra-coordinated complex.

show abstract

“…Therefore, the assignment shown in Table 3 seems to be and garnets. 17 The lithium metasilicate =Li 2 OெSiO 2 ? crystal is also a good host for =Ni 4 ?…”

Section: 12mentioning

confidence: 99%

Absorption and Emission Spectra of Ni-Doped Glasses and Glass-Ceramics in Connection with Its Co-Ordination Number

Khonthon

Morimoto

Ohishi

2006

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

The absorption and emission spectra of Ni-doped glasses and transparent glass-ceramics are discussed in relation to its coordination number. The results evidenced that the color changed drastically to deep pink from yellow for the lithium metasilicate crystal based transparent glass-ceramics and to blue from brown for the spinel crystal based transparent glass-ceramics after crystallization, respectively. The absorption spectra of lithium metasilicate and Spinel glasses suggest the existence of a tetrahedral Ni 2 ion and a trigonal bipyramid Ni 2 ion. On the contrary, tetrahedral Ni 2 ions in the lithium metasilicate transparent glass-ceramics and the octahedral Ni 2 ion in Spinel transparent glass-ceramics are dominant. The emission at around 580 nm was observed in Spinel transparent glass-ceramics under the excitation of 380 nm, however, a very weak or no emission was observed in the lithium metasilicate glass, lithium metasilicate transparent glass-ceramics and Spinel glass under the excitation of 430 nm. This emission might be due to a 1 T 1 D q 3 A 2 F transition after the excitation from 3 A 2 F to 3 T 1 P of the octahedral Ni 2 ions. In addition, only Spinel transparent glass-ceramics exhibits a broad NIR emission at around 1220 nm under the excitation of a 974 nm laser diode. This emission may be due to 3 T 2 F q 3 A 2 F transition. It is considered that the tetrahedral Ni 2 ion is located between the chains in the lithium metasilicate crystal.

show abstract

Optical spectroscopy of Ca3Sc2Ge3O12:Ni2+

Cited by 81 publications

References 5 publications

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Fully relativistic analysis of the absorption spectra of Ca₃Sc₂Ge₃O₁₂:Ni²⁺

Absorption and Emission Spectra of Ni-Doped Glasses and Glass-Ceramics in Connection with Its Co-Ordination Number

Contact Info

Product

Resources

About

Optical spectroscopy of Ca3Sc2Ge3O12:Ni2+

Cited by 81 publications

References 5 publications

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Comparative study of crystal field effects for Ni2+ ion in LiGa5O8, MgF2 and AgCl crystals

Fully relativistic analysis of the absorption spectra of Ca3Sc2Ge3O12:Ni2+

Absorption and Emission Spectra of Ni-Doped Glasses and Glass-Ceramics in Connection with Its Co-Ordination Number

Contact Info

Product

Resources

About

Fully relativistic analysis of the absorption spectra of Ca₃Sc₂Ge₃O₁₂:Ni²⁺