SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 13: Poster Session I: Surface magnetism I

O 13.5: Poster

Montag, 1. März 2021, 10:30–12:30, P

Epitaxial growth of Fe on Be(0001) studied by STM — •Karoline Oetker, Hermann Osterhage, Roland Wiesendanger, and Stefan Krause — Department of Physics, University of Hamburg, Germany

Structural and magnetic properties of Fe thin films can be tuned by the choice of substrate material and lattice structure [1]. Under high pressure, bulk Fe is known to undergo a phase transition to the hexagonal close-packed (hcp) structure [2]. Despite experimental and theoretical efforts, the magnetism of hcp Fe remains unclear [3]. Utilizing substrates with hcp structure as hosts for pseudomorphic growth potentially forces Fe films into the hcp phase, which may then be investigated by spin-polarized scanning tunneling microscopy (SP-STM) [1].
In preparation for such studies, Fe growth on clean Be(0001) surfaces has been investigated in dependence of coverage and substrate temperature during deposition. High resolution STM images and Auger electron spectroscopy will be presented and discussed in terms of growth behavior and chemical composition of the films at room temperature and at elevated temperatures.

[1] R. Wiesendanger, Rev. Mod. Phys. 81, 1495 (2009).
[2] I. Leonov et al., Phys. Rev. Lett. 106, 106405 (2011).
[3] R. Lizárraga et al., Phys. Rev. B 78, 064410 (2008).