Nonmonotonic scaling of the anomalous Hall effect in a bicollinear antiferromagnet.

Nonmonotonic scaling of the anomalous Hall effect in FeTe antiferromagnets reveals complex interplay between magnetism and topology at 49 K.

• Why it matters: Understanding AHE in antiferromagnets without net magnetization is crucial for advancing spintronic devices and fundamental physics, especially in materials with unconventional magnetic structures.
• What they did: Epitaxial FeTe thin films were grown via molecular beam epitaxy, and their AHE was measured, revealing a large conductivity below 60 K and nonlinear behavior near 49 K under high magnetic fields.
• The result: The findings show that field-induced magnetic canting activates AHE responses by modifying Berry curvature, emphasizing the intricate relationship between antiferromagnetism, topological band structure, and electronic transport.