SKM 2021 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 4: Poster
DS 4.5: Poster
Dienstag, 28. September 2021, 10:00–13:00, P
Novel 2D surface alloys on Pt(111): electronic and structural properties — •Marta Przychodnia1, Tomasz Grzela1, Roland Wiesendanger2, and Maciej Bazarnik1,2 — 1Institute of Physics, Poznan University of Technology, Poznan, Poland — 2Department of Physics, Hamburg University, Hamburg, Germany
Lately, a new class of 2D magnetic films has been discovered, namely rare earth (RE) metals - transition metals (TM) surface alloys. Limiting the dimensionality of RE-TM alloys to 2D (so-called surface alloys) influences their properties in surprising ways. For example, a GdAu2 and GdAg2 surface alloys are ferromagnetic while in bulk they are antiferromagnetic. Small change of Au to Ag in this system raise the Curie temperature from 19∘C to 85∘C showing potential for tuneability.
Here, I will present the comparison study of Dy-Pt and Gd-Pt mono- and double-layers of surface alloys grown on Pt(111). Structural and electronic properties in atomic scale of both systems were investigated using scanning tunneling microscopy (STM) and spectroscopy (STS).