Spectroscopic properties of transition elements and their related magnetic properties

Porcher, P.

doi:10.1080/01411598808206829

Cited by 17 publications

(2 citation statements)

References 7 publications

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“…The number of the Stark levels observed from absorption spectra was 149 which represents 39 SLJ manifolds including the 6 spin-orbit interactions. When only these interactions are used, however, discrepancies of an order of a few hundred wave numbers remain between the calculated and experimental energy levels [36]. Minor contributions include the spin-independent two-and three-body interactions between the 4f and different excited configurations as well as the c.f.…”

Section: Absorption Spectramentioning

confidence: 99%

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Hölsä

Kestilä

Ylhä

et al. 1996

J. Phys.: Condens. Matter

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The optical absorption spectra of the rhombohedral DyOF were measured at selected temperatures between 9 and 300 K. The emission spectra of the Dy 3+ ion in the LaOF and GdOF matrices were obtained at 77 K and room temperature. The energy level scheme of Dy 3+ (4f 9 electron configuration) was simulated with a Hamiltonian of 20 parameters. The diagonalization of the energy matrices including simultaneously the free ion and crystal field (c.f.) interactions was carried out for the C 3v point symmetry of the RE 3+ site. Good correlation with an rms deviation of 17 cm −1 was obtained between the experimental and calculated energy level schemes of 153 Kramers doublets. The c.f. parameters show only slight distortion from O h symmetry. A comparison to Pr 3+ (4f 2 ), Nd 3+ (4f 3 ), Sm 3+ (4f 5 ), Eu 3+ (4f 6 ), and Tb 3+ (4f 8 electron configuration) in other REOF matrices showed smooth evolution of the c.f. effect which was discussed in terms of the possible interactions involved. The x-ray powder diffraction pattern of DyOF between 6.5 • < 2θ < 120 • was analysed by the Rietveld profile refinement method. The structural data were used to calculate the c.f. parameters by the modified electrostatic point charge model yielding B 4 0 , B 4 3 and B 6 0 values close to the experimental ones, whereas the B 2 0 , B 6 3 , and B 6 6 values were too large. Using the experimental free ion and c.f. wave functions, the paramagnetic susceptibility of DyOF as a function of temperature was simulated. Above the Néel temperature (3.6 K), good agreement was obtained between the calculated and experimental susceptibilities in the paramagnetic range.

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Section: Absorption Spectramentioning

confidence: 99%

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Hölsä

Kestilä

Ylhä

et al. 1996

J. Phys.: Condens. Matter

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“…The RE ion experiences the c.f. effect as an inhomogeneous electrostatic field which is produced by the surrounding charge distribution [15]. The simulation of the energy level scheme of the 4f 3 configuration was carried out by using a phenomenological model which treated simultaneously the free ion and c.f.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Energy Level Scheme of Nd³⁺Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)

Beaury¹,

Hölsä

Korventausta

et al. 1996

Acta Phys. Pol. A

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The energy level schemes of the neodymium oxyhalides (NdOX, X = F, Cl, and Br) were studied and simulated with a phenomenological model accounting simultaneously for both the free ion interactions and the crystal fleld effect. The former included the electrostatic and interconfigurational interactions as well as the spin-orbit coupling. The simulations were carried out by using the data from the optical absorption and luminescence as well as the inelastic neutron scattering measured at low temperatures between 2.5 and 77 K. The values of the Slater integral F 2 describing the eJectrostatic interactions decrease while F 4 and F6 increase as a function of the ionic radius of the halide anion. The strength of the spin-orbit coupling is quite the same in all three matrices. The crystal field effect -measured as the crystal fleld strength parameter S -is almost twice as strong in the hexagonal NdOF matrix (650 cm -1 ) than in the tetragonal NdOCI or NdOBr (367 and 378 cm -1 , respectively). Similar evolution was obtained for the shortand mid-range crystal field strengths related to the spatial extension of the interaction.

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A New Nasicon-Type Phosphate:Co0.5Ti2(PO4)3II. Simulation of Optical and Magnetic Properties

Derouet

Beaury

Porcher

et al. 1999

Journal of Solid State Chemistry

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Spectroscopic properties of transition elements and their related magnetic properties

Cited by 17 publications

References 7 publications

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Energy Level Scheme of Nd³⁺Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)

A New Nasicon-Type Phosphate:Co0.5Ti2(PO4)3II. Simulation of Optical and Magnetic Properties

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Spectroscopic properties of transition elements and their related magnetic properties

Cited by 17 publications

References 7 publications

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Analysis of the optical spectra and paramagnetic susceptibility of DyOF

Energy Level Scheme of Nd3+Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)

A New Nasicon-Type Phosphate:Co0.5Ti2(PO4)3II. Simulation of Optical and Magnetic Properties

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Energy Level Scheme of Nd³⁺Ion in Rare Earth Oxyhalides, REOX (X = F, Cl, and Br)