Crystal Field Spectroscopy

Crystal-field interaction and oxygen stoichiometry effects in strontium-doped rare-earth cobaltates

“…The large number of independent crystal-field parameters makes the parametrization of crystal-field spectra somehow arbitrary. However, as repeatedly shown in the past for several perovskite compounds [15][16][17]29,30],…”

“…Eqs (3) and ( 5) are well suited to extrapolate the crystal-field parameters from a particular rare-earth compound with R 1 ions to another isostructural compound with R 2 ions through the relation [29] €…”

“…In fact, this splitting turns out to be important for an unambiguous determination of A 2 from the experimental data, since Eq. ( 3) cannot be applied to second-order crystal-field parameters [29].…”

“…Deviations from the "ideal" oxygen charge q=-2|e| are expected due to the screening of the 4f electrons by the outer shells, which can be taken into account by adding in Eq. (3) shielding (and antishielding) factors defined in Refs[29,31]. For the light R ions Pr and Nd we failed to detect most of the excited crystal-field transitions due to the reasons explained in Sec.…”

Valence, exchange interaction, and location of Mn ions in polycrystalline MnxGa1−xNFürrer1, Krämer2, Podlesnyak3 et al. 2018Phys. Rev. B2020View full textAdd to dashboardCite

“…where D is the axial single-ion anisotropy parameter, and s z denotes the zcomponent of the spin operator s of the Mn ions. The corresponding neutron cross-section for monomer transitions |m>→|m'> is defined by [17]…”