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

We report a magnetic imaging method using atomic force microscopy to measure a locally induced anomalous Nernst effect. A tip contact creates a local temperature gradient on a sample surface controlled by a neighboring Joule heating wire. We demonstrate 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.

Appl. Phys. Lett. 122, 102401 (2023)

Nico Budai, Hironari Isshiki, Ryota Uesugi, Zheng Zhu, Tomoya Higo, Satoru Nakatsuji, and YoshiChika Otani

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