Topological Hall effect and magnetic domain walls in kagome ferrimagnetic HoMn6Sn6 single crystals

Abstract

This study explores the distinctive physical properties of HoMn6Sn6 single crystal with a kagome lattice structure. The magnetic and electronic transport properties of this material exhibit strong dependence on both the rare-earth element R and the crystallographic orientation. We systematically investigate in-plane magnetism and electronic transport in HoMn6Sn6, revealing a temperature-induced spin reorientation. The observation of a topological Hall effect within the 100–300 K range provides evidence of non-collinear spin textures. These textures are identified as 180° and 360° magnetic domain walls through direct imaging using Lorentz transmission electron microscopy. Our results establish HoMn6Sn6 as a good candidate for investigating the interplay between magnetic domain walls and magnetoelectric transport properties of kagome magnetic materials.