Evidence of non-coplanar spin textures in Weyl semi-metal candidate β iron germanide

The exploitation of skyrmions, merons, or other non-coplanar spin textures as dynamic components in novel computational schemes has been of substantial interest since the experimental discovery of skyrmions in the B20 compounds. Naturally, systems that show ferromagnetic order up to or surpassing room temperature have significant potential for device applications. We report here the examination of the magnetic and electronic behavior of the under studied Fe1.7Ge, otherwise known as β iron germanide. Evidence of non-coplanar spin textures arises from both the conventional and so-called "unconventional" topological Hall effect, both of which have been shown to be sensitive to a wide array of non-coplanar spin textures such as Bloch domain walls, skyrmions, and merons. This material system supplies a test bed for understanding the interplay between strong electron correlations, electronic topology, and non-coplanar spin textures.