Crystal field and Electron–Phonon Interaction in Rare-Earth Ionic Paramagnets

Малкин, Б. З.

doi:10.1016/b978-0-444-87051-3.50008-0

Cited by 115 publications

(167 citation statements)

References 50 publications

Supporting

Mentioning

164

Contrasting

Unclassified

Order By: Relevance

“…Energy levels of trivalent chromium ions doped in BSO represented by the eigenvalues of the following crystal field Hamiltonian [10]: Expressions for calculating both contributions to the CFP in the case of 3d-ion are as follow [10]: of p-th power of the impurity ion electron radial coordinate can be calculated using the wave functions of the 3d-ions given in [12]. The values of the numerical factors …”

Section: Figure1 Elementary Cell Of Bi 12 Sio 20 Crystalmentioning

confidence: 99%

See 1 more Smart Citation

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Petkova¹,

Andreici²,

Avram³

2014

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. The aim of this paper is to give an analysis of crystal field parameters and energy levels schemes for the above doped material, in order to give a reliable explanation for experimental data. The crystal field parameters have been modeled in the frame of Exchange Charge Model (ECM) of the crystal field theory, taken into account the geometry of systems, with actually site symmetry of the impurity ions. The effect of the charges of the ligands and covalence bonding between chromium cation and oxygen anions, in the cluster approach, also were taken into account. With the obtained values of the crystal field parameters we simulated the scheme of energy levels of chromium ions by diagonalizing the matrix of the Hamiltonian of the doped crystal. The obtained energy levels and estimated Racah parameters B and C were compared with the experimental spectroscopic data and discussed. Comparison with experiment shows that the results are quite satisfactory which justify the model and simulation scheme used for the title system.

show abstract

Section: Figure1 Elementary Cell Of Bi 12 Sio 20 Crystalmentioning

confidence: 99%

“…The value of the ECM fitting parameter G=0.389 was determined from the position of the third absorption band in the corresponding absorption spectra [10].…”

Section: Figure1 Elementary Cell Of Bi 12 Sio 20 Crystalmentioning

confidence: 99%

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Petkova¹,

Andreici²,

Avram³

2014

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…The averaged values r p of the p-th power of the impurity ion electrons coordinate can be found in [7]. The values of the numerical factors K k p , γ p and expressions for the polynomials V k p are given in [6]. The overlap integrals between the d-functions of the central ion and the pand s-functions of the ligands are denoted by S s , S σ , S π (they correspond to the integrals (in lm|l m nota-…”

Section: +mentioning

confidence: 99%

“…The energy levels of Cr 3+ ion in this work are represented by the eigenvalues of the crystal field Hamiltonian of the form [6] …”

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

Crystal Field Analysis and Electron-phonon Coupling in Sc₂O₃:Cr³⁺

Brik

Avram

2004

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

Crystal field analysis of the energy level structure of the Cr 3+ ion in the Sc 2 O 3 crystal is performed, using the exchange charge model of the crystal field theory. The crystal field parameters acting on the optical electrons of the Cr 3+ ion at the sites with C 2 and C 3i symmetry are calculated from the crystal structure data. On the basis of the comparison between experimental absorption and emission spectra and theoretically calculated energy levels of Sc 2 O 3 :Cr 3+ , the conclusion is made that the spectroscopic properties of the title host are determined by the Cr 3+ ion at the positions of C 2 local symmetry. The Stokes shift S = 4.32 and the energy of the phonons effectively interacting with an impurity centerhω = 499 cm −1 are derived from the experimental spectra of absorption and emission.

show abstract

Structural Confinement toward Giant Enhancement of Red Emission in Mn²⁺‐Based Phosphors

Zhang

Gautier

et al. 2018

Adv Funct Materials

131

View full text Add to dashboard Cite

Structural confinement effect on a pair of Eu 2+ and Mn 2+ optical centers is developed to realize the greatly enhanced red emission attributed to the 4 T 1 ( 4 G)-6 A 1 ( 6 S) transition of Mn 2+ ions. Sr 9 Mn 1.26(2) Li 0.24(2) (PO 4−δ ) 7 , when it is doped with Eu 2+ , emerges as a new red-emitting phosphor, and the intensity dependence of such a red emission on the trace amounts of Eu 2+ doping is quantitatively analyzed with a combined experimental and theoretical methods. The modeling result confirms the validity of this proposed design strategy, and the intrinsic high-efficient Eu 2+ -Mn 2+ energy transfer process can be elucidated by the structural confinement effect featured as some Sr (Eu) close to Mn atoms. The results can initiate the exploration of Mn 2+ -based red phosphors for pc-white light-emitting diodes applications, and such a strategy can be easily expanded to other systems, thus opening a new perspective for the development of luminescence materials.

show abstract

Crystal field and Electron–Phonon Interaction in Rare-Earth Ionic Paramagnets

Cited by 115 publications

References 50 publications

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Crystal Field Analysis and Electron-phonon Coupling in Sc₂O₃:Cr³⁺

Structural Confinement toward Giant Enhancement of Red Emission in Mn²⁺‐Based Phosphors

Contact Info

Product

Resources

About

Crystal field and Electron–Phonon Interaction in Rare-Earth Ionic Paramagnets

Cited by 115 publications

References 50 publications

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Crystal field parameters and energy levels scheme of trivalent chromium doped BSO

Crystal Field Analysis and Electron-phonon Coupling in Sc2O3:Cr3+

Structural Confinement toward Giant Enhancement of Red Emission in Mn2+‐Based Phosphors

Contact Info

Product

Resources

About

Crystal Field Analysis and Electron-phonon Coupling in Sc₂O₃:Cr³⁺

Structural Confinement toward Giant Enhancement of Red Emission in Mn²⁺‐Based Phosphors