High-resolution magnetic imaging by mapping the locally induced anomalous Nernst effect using atomic force microscopy

2025/08/05 by Budai, Nico, Isshiki, Hironari, Uesugi, Ryota +4 · 1 citation
#Applied Physics (physics.app-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2508.03066

Abstract

We report a magnetic imaging method using atomic force microscopy to measure the locally induced anomalous Nernst effect. The tip contact creates a local temperature gradient on the sample surface controlled by a neighboring Joule heating wire. We demonstrate the imaging of magnetic domains in a nanowire of the ferromagnetic Weyl semimetal Co2MnGa with a spatial resolution of a sub-hundred nanometer at room temperature.

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• Observation of cluster magnetic octupole domains in the antiferromagnetic Weyl semimetal Mn3Sn nanowire
• Direct determination of layer anomalous Hall conductivity using uniaxial Wannier functions

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