Imaging Surface Magnetization in Altermagnetic MnTe Films
Researchers used scanning-probe nitrogen-vacancy microscopy to image spontaneous magnetic domains in altermagnetic MnTe films. They found that an external magnetic field can control these domains, and the weak magnetization observed is largely surface-dominated due to symmetry breaking. This nanoscale spin structure correlates directly with the anomalous Hall effect, providing insights for spintronic device design.