Regensburg 2022 – scientific programme

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MA: Fachverband Magnetismus

MA 34: Functional Antiferromagnetism

MA 34.2: Talk

Thursday, September 8, 2022, 15:15–15:30, H48

Exploring the magnetic ground states in different layers of Mn on Ir (111) by SP-STM — •vishesh saxena, arturo rodriguez sota, Roland Wiesendanger, and Kirsten von Bergmann — Institut für Nanostruktur- und Festkörperphysik, Hamburg

Conventional magnetic skyrmions are susceptible to unwanted phenomena such as the skyrmion Hall effect. This is a highly undesirable effect that hinders the application of such skyrmions in spintronic devices. An alternative are antiferromagnetic skyrmions which do not show a skyrmion Hall effect [1]. In the quest to explore systems that can host antiferromagnetic skyrmions, we have studied the magnetism of Mn on Ir (111) using spin-polarized scanning tunneling microscopy (SP-STM). Having an antiferromagnetic spin order on a periodic lattice can induce magnetic frustration. It has already been shown that the magnetic ground states of Mn monolayers on Re (0001) can be the row-wise antiferromagnetic state or the 3Q state depending on the stacking of Mn [2]. In the present work, the magnetic behavior of the monolayer, double layer, and the triple layer of Mn on Ir(111) is studied. Different magnetic ground states are observed depending on the Mn layer thickness.

[1] X. Zhang, Y. Zhou, and M. Ezawa, Antiferromagnetic Skyrmion: stability, creation and manipulation, Scientific Reports 6, 1 (2016). [2] J. Spethmann, S. Meyer, K. von Bergmann, R. Wiesendanger, S. Heinze, and A. Kubetzka, Discovery of magnetic single-and triple-q states in Mn/Re(0001), Physical Review Letters 124, 227203 (2020).