Observation of dynamical spin-dependent electron interactions and screening in magnetic transitions via core-level multiplet-energy separations

0424501 - FZÚ 2014 RIV NL eng J - Journal Article
Tober, E.D. - Palomares, F.J. - Ynzunza, R.X. - Denecke, R. - Morais, J. - Liesegang, J. - Hussain, Z. - Shick, Alexander - Pickett, W. E. - Fadley, C. S.
Observation of dynamical spin-dependent electron interactions and screening in magnetic transitions via core-level multiplet-energy separations.
Journal of Electron Spectroscopy and Related Phenomena. Roč. 189, AUG (2013), s. 152-156. ISSN 0368-2048. E-ISSN 1873-2526
Institutional support: RVO:68378271
Keywords : photoelectron spectroscopy * electronic structure
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.552, year: 2013
http://www.sciencedirect.com/science/article/pii/S0368204812001880

The magnetic phase transitions for Gd(0 0 0 1) grown on W(1 1 0) – a bulk transition at 293 K and a surface transition about 85 K above this – are found to influence the energy separation of the Gd 5s and 4s core-photoelectron doublets. The 5s doublet separation ΔE5s changes over a range of temperatures spanning these transitions, and decreases by a maximum of 60 meV in this region, but then recovers its original value; the 4s doublet shows a smaller change in the reverse direction, which does not recover at high temperature. Some of these effects are semi-quantitatively understood from free-atom multiplet theory and from theoretical calculations based on all-electron LDA+U calculations including 4f electron correlation effects.
Permanent Link: http://hdl.handle.net/11104/0230550