Fe−3s core-level splitting and local magnetism in Fe2VAl

X-ray and soft x-ray photoelectron spectra were taken on Fe2VAl samples. The Fe−3s spectra show a shoulder on the higher binding energy side of the main peak, split by ≈4.7 eV. Based on current understanding of core-level multiplet splitting in transition-metal compounds, we believe this is direct evidence of a local moment in Fe2VAl

Fe−3s core-level splitting and local magnetism in Fe2VAl

X-ray and soft x-ray photoelectron spectra were taken on Fe2VAl samples. The Fe−3s spectra show a shoulder on the higher binding energy side of the main peak, split by ≈4.7 eV. Based on current understanding of core-level multiplet splitting in transition-metal compounds, we believe this is direct evidence of a local moment in Fe2VAl.This article is from Physical Review B 63 (2001): 054419, doi:10.1103/PhysRevB.63.054419. Posted with permission.</p

Fabrication and VUV luminescence of Lu2_2O3_3:Eu3+^{3+} (5 at.%) nanopowders and transparent ceramics

Low-agglomerated Lu$_2$O$_3$:Eu$^{3+}$ 5 at.% nanopowders, as well as transparent ceramics were fabricated by co-precipitation with ammonium hydrogen carbonate and vacuum sintering method, respectively. It was determined that transition of a part of europium ions into the divalent state enhanced sinterability due to formation of anionic vacancies and decrease of the RE-O bonds covalency. The luminescent properties of the Lu$_2$O$_3$:Eu$^{3+}$ 5 at.% nanopowders and ceramics were studied under excitation by synchrotron radiation. The difference in the excitation spectra of Lu$_2$O$_3$:Eu$^{3+}$ nanopowders and ceramics are caused by participation of the F$^+$ centers in the excitation processes of Eu$^{3+}$ luminescence in Lu$_2$O$_3$ host. Finally, the locations of the energy levels related to the Eu$^{3+}$ dopant in Lu$_2$O$_3$ matrix were determined