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  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6069-6071 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The crystal-field splitting of the Er3+ ground multiplet 4I15/2 in ErPO4 is investigated by inelastic neutron scattering. Four excitations from the Γ7 ground state to the excited states and several transitions between the excited states have been identified. The observed transition energies and intensities are used to refine the parameters of the crystal-field potential. The calculated magnetic susceptibility χ(T) agrees well with experimental values from single-crystal measurements. A comparison of the neutron data with optical absorption and both nonresonance and resonance Raman scattering measurements has been made.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 1-4 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The 5f1→6d1 absorption spectrum of 231Pa4+ diluted in a single crystal of Cs2ZrCl6 has been measured at 4.2 K. Three bands corresponding to the 6d(Γ8g, Γ7g, and Γ'8g ) levels are assigned. Extensive vibronic structure has been observed for the lowest 5f→6d transition and this structure is compared to that recently reported for the 6d1→5f1 emission spectra in the same system.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 4214-4222 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The magnetic-excitation spectrum of TmPO4 has been studied using inelastic neutron scattering techniques. Sharp crystal-field transitions were observed in spectra obtained at 15 and 100 K, yielding new information regarding the energy-level structure of the Tm3+ ground-multiplet splitting. The data were analyzed using a Hamiltonian that included the atomic free-ion and crystal-field interactions for an f12 configuration. Using the Tm free-ion parameters derived from optical spectroscopy of Tm3+ diluted in a LuPO4 host, a set of crystal-field parameters were obtained for Tm3+ in pure TmPO4. The calculated magnetic spectra of TmPO4 agree very well with the results of neutron and Raman measurements. The calculated bulk magnetic susceptibility of TmPO4 exhibits a large anisotropy at low temperature and is in good agreement with the experimental data. A significant contribution to the specific heat from the Tm3+ crystal-field states was found at temperatures below 100 K.
    Type of Medium: Electronic Resource
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