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MA: Fachverband Magnetismus

MA 10: Focus Session: Higher-Order Magnetic Interactions - Implications in 2D and 3D Magnetism I

MA 10.5: Talk

Wednesday, September 29, 2021, 15:45–16:00, H5

Two-dimensional atomic-scale spin textures in Fe monolayers — André Kubetzka, Roland Wiesendanger, and •Kirsten von Bergmann — Department of Physics, University of Hamburg, Germany

Higher-order interactions can induce two-dimensionally modulated magnetic ground states at zero magnetic field, and spin-polarized scanning tunneling microscopy (SP-STM) is a powerful tool to characterize such spin structures down to the atomic scale [1-3].

Using SP-STM we have recently observed several different square or hexagonal magnetic ground states in Fe monolayers in contact with Rh and Ir layers. The details of the resulting states with magnetic periods on the order of one nanometer depend critically on the stacking of the Fe layer and the number of adjacent Rh or Ir layers [1,4-7].

[1] S. Heinze et al., Nature Phys. 7, 713 (2011).

[2] Y. Yoshida et al., Phys. Rev. Lett. 108, 087205 (2012).

[3] J. Spethmann et al., Phys. Rev. Lett. 124, 227203 (2020).

[4] K. von Bergmann et al., Nano Lett. 15, 3280 (2015).

[5] N. Romming et al., Phys. Rev. Lett. 120, 207201 (2018).

[6] A. Kubetzka et al., Phys. Rev. Materials 4, 081401(R) (2020).

[7] M. Gutzeit et al., (in preparation).