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Regensburg 2022 – scientific programme

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O: Fachverband Oberflächenphysik

O 71: Focus Session: Atomic-Scale Studies of Spins on Surfaces with Scanning Tunneling Microscopy 2

O 71.9: Talk

Thursday, September 8, 2022, 17:30–17:45, S051

Growth and magnetic characterization of thermally robust cobalt islands on Cu3Au(111) — •Aleš Cahlík, Danyang Liu, Berk Zengin, and Fabian Natterer — Institute of Physics, UZH, Zurich, Switzerland

Due to a larger tunability of the effective lattice parameter, bimetallic alloys can be an appealing choice as an alternative substrate for the growth of thin films and nanostructures. In this respect, we investigate Cu3Au(111) as a platform for the growth of cobalt nano-islands. Using STM, we demonstrate unique thermal stability of Co/Cu3Au(111) up to ∼340 C, compared to the fast intermixing of Co/Cu(111) at room temperature. We explore the structural and magnetic properties of the Co islands with spin-polarized and nickelocene functionalized tips. Finally, we find an effective method to produce spin-polarized tips by deliberately lifting off an entire island from the substrate and transferring it to the STM tip.

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