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Updated: May 23, 2026

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Conical spin-spiral state in an ultrathin film driven by higher-order spin interactions
Y Yoshida1, S Schröder, P Ferriani
1Institute of Applied Physics, University of Hamburg, Hamburg, Germany.
Abstract:
We report a transverse conical spin spiral as the magnetic ground state of a double-layer Mn on a W(110) surface. Using spin-polarized scanning tunneling microscopy, we find a long-range modulation along the [001] direction with a periodicity of 2.4 nm coexisting with a local row-wise antiferromagnetic contrast. First-principles calculations reveal a transverse conical spin-spiral ground state of this system which explains the observed magnetic contrast. The canting of the spins is induced by higher-order exchange interactions, while the spiraling along the [001] direction is due to frustrated Heisenberg exchange and Dzyaloshinskii-Moriya interaction.
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