Influence of spin-orbit coupling on the magnetic dipole term T.sub.α./sub.

0466859 - FZÚ 2017 RIV US eng J - Journal Article
Šipr, Ondřej - Minár, J. - Ebert, H.
Influence of spin-orbit coupling on the magnetic dipole term T_α.
Physical Review B. Roč. 94, č. 14 (2016), 1-7, č. článku 144406. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA MŠMT LD15097
Institutional support: RVO:68378271
Keywords : spin-orbit coupling * magnetism * XMCD
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.836, year: 2016

The influence of the spin-orbit coupling (SOC) on the magnetic dipole term Talpha is studied across a range of systems in order to check whether the Talpha term can be eliminated from analysis of x-ray magnetic circular dichroism spectra performed via the spin moment sum rule. Fully relativistic Korringa-Kohn-Rostoker Green’s function calculations for Co monolayers and adatoms on Cu, Pd, Ag, Pt, and Au (111) surfaces were performed to verify whether the sum over magnetic dipole terms Tx + Ty + Tz is zero and whether the angular dependence of the Talpha term goes as 3cos2theta−1. It follows that there are circumstances when the influence of the SOC on Talpha cannot be neglected even for 3d atoms where the SOC is nominally small. The crucial factor appears to be the dimensionality of the system: For 3d adatoms, the influence of SOC on Talpha can be significant whereas for monolayers it is always practically negligible.
Permanent Link: http://hdl.handle.net/11104/0265121