Energy Levels of Sm<sup>2+</sup> in BaClF and SrClF Crystals under Magnetic Field II. Results

Kibler, M.; Con, J. C. G; Grenet, Geneviève; Jacquier, B.; Brunel, Louis Claude

doi:10.1002/pssb.2221240232

Cited by 6 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Equations (15a) and (15b) may be used to reduce the number of parameters as will be seen in Part I1 [20].…”

Section: Using 0 3 3 C 3 C 4 X C4 Parametersmentioning

confidence: 99%

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Kibler¹,

Grenet²,

Con³

et al. 1984

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

The theoretical models and their accompanying procedures described in the first paper of this series are applied to the interpretation of the fluorescence spectrum under magnetic field of Sm2+ in BaClF and SrClF. The good agreement between theory and experiment testifies to the quality of the parameters involved in the zero-field Hamiltonian.Les modbles theoriques et leurs procedures daccompagnement dhcrits dans le premier article de cette aerie sont appliques L l'interpretation du spectre de fluorescence SOUB champ magnbtique de Sm2+ dans BaClF et SrCIF. Le bon accord entre theorie et experience atteste de la qualit6 des parambtres intervenant dans le hamiltonien en champ nul.

show abstract

“…Equations (15a) and (15b) may be used to reduce the number of parameters as will be seen in Part I1 [20].…”

Section: Using 0 3 3 C 3 C 4 X C4 Parametersmentioning

confidence: 99%

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Kibler¹,

Grenet²,

Con³

et al. 1984

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

show abstract

“…L'ion Sm + 2 se substitue dans les phases MC1F a l'ion M+2 en un site de sym6trie C4v. La determination expérimentale et th6orique des niveaux Stark issus de 1'eclatement des premiers termes 'F et 5D de la configuration fondamentale 4£6 dans les composes BaCIF : 5 °/°° Sm+2 et SrCIF : 1 °/o° SM12 ainsi que 1'etude de 1'action d'un champ magn6tique sur ces memes niveaux ont fait l'objet de travaux r6cents [8][9][10][11][12].…”

unclassified

Addition de photons par transfert d'énergie et absorption dans l'état excité dans les matériaux MClF: Sm+2 (M = Ba, Sr)

et al. 1986

Self Cite

View full text Add to dashboard Cite

Sous excitation sélective par laser à impulsions dans le premier niveau métastable 5D0 de l'ion Sm+2 incorporé dans les matrices BaCIF et SrCIF avec des concentrations diverses (0,1 ~, 1 ~, 5 ~), nous avons observé à 4,4 K les fluorescences anti-Stokes issues des niveaux supérieurs 5D1 et 5D2, situés respectivement à 1 339 et 3 280 cm-1 au-dessus de 5D0. L'analyse de l'évolution temporelle de ces émissions montre l'intervention de deux mécanismes distincts : (i) une absorption à partir de l'état excité 5D0 clairement mise en évidence par une expérience de double excitation, (ii) une addition de photons par transfert d'énergie (A.P.T.E.) dont l'existence est suggérée par l'effet de la concentration. La compétition entre les deux mécanismes apparaît nettement lors de l'examen de l'influence de l'intensité et de la longueur d'onde de la radiation excitatrice sur le profil des déclins de fluorescence. La résolution numérique des équations de populations prenant en compte les deux processus permet de reproduire l'ensemble des résultats expérimentaux. L'évaluation des contributions relatives des deux mécanismes conduit à considérer que le transfert d'énergie peut être à l'origine de 70 % de l'intensité de la fluorescence anti-Stokes dans le matériau BaClF:5 ~ Sm+2 à faible énergie d'excitation, cette proportion diminuant considérablement lorsque la puissance du faisceau excitateur augmente. Abstract. 2014 Under selective pulsed excitation into the first metastable excited state 5D0 of the Sm+2 ion embedded in BaCIF and SrCIF crystals with different concentrations (0.1 ~, 1 ~, 5 0/00>, we have observed anti-Stokes emissions originating from the 5D1 and 5D2 multiplets respectively located at 1 339 and 3 280 cm-1 above 5D0, at 4.4 K. The analysis of the fluorescence decays shows that two mechanisms are involved : (i) an excited-state absorption from the 5D0 level unambiguously identified by a double excitation experiment, (ii) an up-conversion by energy transfer between Sm+2 ions excited in the 5D0 state evidenced by the effect of the dopant concentration.

show abstract

Energy levels of paramagnetic ions: Algebra. III. The case of d^N ions in cubical symmetry

Kibler

Grenet

1985

Int J of Quantum Chemistry

View full text Add to dashboard Cite

The formalism developed in the f i t two papers of this series is applied to the investigation of a new weak-field model. This crystal-field model lies on the use of a symmetry-adapted weak-field basis and an effective Hamiltonian involving in a symmetricd way both spin-and orbit-dependent contributions. Some general properties of this Hamiltonian are studied and complete calculation of its matrix elements is conducted in a symmetry-adapted weak-field basis in the case of an arbitrary configuration nlN in any symmetry. The case of a configuration nd" in octahedral symmetry is fully explored. In this case, the proposed weak-field model is restricted to a 12-parameter model which accounts for isotropic and anisotropic Coulomb interactions, isotropic and anisotropic spin-orbit interactions, and crystal-field interactions. A comparison between this 12-parameter weak-field model and the 14-parameter strong-field model is established. Equivalence between the latter two models requires two constraint relations to be satisfied for some strong-field parameters. These two relations are examined with various viewpoints.

show abstract

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field II. Results

Cited by 6 publications

References 7 publications

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Addition de photons par transfert d'énergie et absorption dans l'état excité dans les matériaux MClF: Sm+2 (M = Ba, Sr)

Energy levels of paramagnetic ions: Algebra. III. The case of d^N ions in cubical symmetry

Contact Info

Product

Resources

About

Energy Levels of Sm2+ in BaClF and SrClF Crystals under Magnetic Field II. Results

Cited by 6 publications

References 7 publications

Energy Levels of Sm2+ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Energy Levels of Sm2+ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Addition de photons par transfert d'énergie et absorption dans l'état excité dans les matériaux MClF: Sm+2 (M = Ba, Sr)

Energy levels of paramagnetic ions: Algebra. III. The case of dN ions in cubical symmetry

Contact Info

Product

Resources

About

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field II. Results

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Energy Levels of Sm²⁺ in BaClF and SrClF Crystals under Magnetic Field I. Theory

Energy levels of paramagnetic ions: Algebra. III. The case of d^N ions in cubical symmetry