In‐Situ Monitoring the Magnetotransport Signature of Topological Transitions in a Chiral Magnet

作者：Andy Thomas, Darius Pohl, Alexander Tahn, H. Schlörb, Sebastian Schneider, Dominik Kriegner, Sebastian Beckert, Praveen Vir, M. Winter, Claudia Felser, Bernd Rellinghaus · 发表于：Small Methods · 年份：2025 · DOI：10.1002/smtd.202401875 · 被引用次数：4 · 研究领域：Magnetic properties of thin films、Physics of Superconductivity and Magnetism、Magnetic and transport properties of perovskites and related materials

Abstract Emerging magnetic fields related to the presence of topologically protected spin textures such as skyrmions are expected to give rise to additional, topology‐related contributions to the Hall effect. In order to doubtlessly identify this so‐called topological Hall effect, it is crucial to disentangle such contributions from the anomalous Hall effect. This necessitates a direct correlation of the transversal Hall voltage with the underlying magnetic textures. A novel measurement platform is developed that allows to acquire high‐resolution Lorentz transmission electron microscopy images of magnetic textures as a function of an external magnetic field and to concurrently measure the (anomalous) Hall voltage in‐situ in the microscope on one and the same specimen. This approach is used to investigate the transport signatures of the chiral soliton lattice and antiskyrmions in Mn 1.4 PtSn. Notably, the observed textures allow to fully understand the measured Hall voltage without the need of any additional contributions due to a topological Hall effect, and the field‐controlled formation and annihilation of anstiskyrmions are found to have no effect on the measured Hall voltage.