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

TL;DR

This paper introduces a high-resolution magnetic imaging technique using atomic force microscopy to detect the anomalous Nernst effect, enabling detailed visualization of magnetic domains at sub-hundred nanometer resolution.

Contribution

The study presents a novel AFM-based method for magnetic imaging through the anomalous Nernst effect, achieving high spatial resolution at room temperature.

Findings

Successful imaging of magnetic domains in Co2MnGa nanowires.

Achieved sub-hundred nanometer spatial resolution.

Operates effectively at room temperature.

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.