Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 41: Surface magnetism I
MA 41.1: Vortrag
Donnerstag, 15. März 2018, 09:30–09:45, EB 202
Magnetic properties of the HoAu2 surface alloy — •Maxim Ilyn1,2, Maria Blanco-Rey1,3, Enrique Ortega1,2,4, and Frederik Schiller1,2 — 1Donostia International Physics Center (DIPC) — 2Materials Physics Center CSIC-UPV/EHU — 3Department of Materials Physics, University of Basque Country UPV/EHU — 4Department of Applied Physics, University of Basque Country
Magnetic properties of single atoms of Holmium deposited on the surface of different single crystalline substrates were a topic of active investigations in last few years. Hybridization of the Ho orbitals with electronic states of the substrate and symmetry of the crystal field were shown to be crucial in defining Ho ground state.
In this work we present results of the experimental investigation of the magnetic properties of HoAu2 surface alloy. A crystal field in the position of Ho atoms in this alloy has the same C3v symmetry as in the case of the Ho adsorbed on the hollow sites of (111) surface of the fcc crystal. However, the coordination is higher which results in a well-defined stable stoichiometry.
Samples prepared by deposition of Ho on the pre-heated surface of the Au(111) single crystal in the UHV environment were characterized by means of STM, LEED and ARPES. Its magnetic properties were measured in a synchrotron using XMCD spectroscopy and simulated with a help of the multiplet calculations.