Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 45: Spin Structures at Surfaces and in thin films I (Skyrmions)
MA 45.7: Vortrag
Donnerstag, 3. April 2014, 16:45–17:00, BEY 118
The influence of oxygen adsorption on the magnetic structure of the iron monolayer on the Ir(001) surface — •Frantisek Maca1, Josef Kudrnovsky1, Vaclav Drchal1, and Josef Redinger2 — 1Institute of Physics ASCR, Prague, Czech Republic — 2Institute of General Physics TU Vienna, Vienna, Austria
We present an ab initio study of the electronic structure and magnetic order of one Fe monolayer on the Ir(001) surface covered by adsorbed oxygen and hydrogen. We show that the adsorption of oxygen (and also of the hydrogen) leads to the p(2x1) antiferromagnetic order. The p(2x1)-ordering is weakened by decreasing oxygen coverage and changes into complex magnetic ground state for the oxygen free case. This result was obtained by two complementary approaches, namely using the total energy evaluations for limited number of magnetic configurations and by a disordered local moment analysis. Based on the calculated magnetic ground states, we also estimate theoretically the spin-polarized scanning tunneling images using a simple Tersoff-Hamann model.
F. Máca, J. Kudrnovský, V. Drchal, and J. Redinger, Phys. Rev. B 88, 045423 (2013).