PIs: István Kézsmárki, Kai Litzius

In this project we study materials, like the Weyl semimetals Fe3Sn2 and Co3Sn2S2, where changes in the magnetic state are expected to strongly influence the topological features of bulk electronic and/or magnon bands as well as affect topologically protected surface states. Our mission is to image magnetic textures emerging in these materials, and their dependence on temperature, magnetic field and sample geometry, using magnetic force microscopy and scanning transmission X-ray microscopy. These techniques offer complementing abilities to image both bulk and surface states. Our results about the variation of the magnetization on the mesoscale will be crucial for other experimental and theoretical projects aiming to explore topological bulk and surface states in these materials.