The Spark Spectrum of Europium, Eu II

Evaluation of evidence for magnetic polarons inEuB6

“…Using a critical temperature T c ∼ 12 K and a parabolic approximation to the bands, J ′ ∼ 0.1 eV is found, consistent with reported data for isolated Eu-ions [15]. In this estimation we are considering that only one kind of carrier is responsible for the magnetism.…”

“…Using this value and the energy of the Stokes' shift we obtain J ′ ∼ 3meV. This is far too low compared to the values reported in the literature for J ′ in isolated Eu ions ∼ 100meV [9,15]. We are therefore left with a conundrum: the peak in the light scattering intensity follows all the trends calculated for an object with magnetic origin but the energy of that peak is almost two orders of magnitude smaller than expected.…”

Luminescent properties of .BETA.-SiAlON:Eu2+ green phosphors synthesized by gas pressured sintering

“…3(a-b) The energy level scheme of Eu 2＋ has been known for a long time. 21), 22) In the emission spectra, either sharp 4f → 4f transitions or very broad band emissions because of 5d → 4f transitions are usually observed depending on how large is the ligand field splitting of the 5d levels because the 4f levels remain unaffected.…”

The hyperfine structure of they 8 p-multiplet of 4f 7(8 S) 6s 6p in EuI

“…For the evaluation of A and B the gj value determined by Russel, A1-bertson and Davis [6] and the gx value measured by Evans, Sandars and Woodgate [5] were used. A detailed theoretical interpretation of the magnetic and quadrupole hyperfine structure of the levels with the subconfiguration 4f 7 (8S)6s 6p was carried out by Bordarier, Judd and Klapisch [7].…”