Neutron powder diffraction study of the magnetic states in the CeAlSi/CeAlGe family of Weyl semimetals

The family of Weyl semimetals present an exciting opportunity to study novel electromagnetic responses, such as the topological and anomalous Hall Effects in response to applied fields. These novel electromagnetic responses have potential applications in a range of novel technologies and as such have received a great deal of interest over recent years. The topological states exhibited by these materials can be tuned by magnetic fields, and also more easily by chemical substitution. In this work, we propose to obtain a set of structural and magnetic data on the substituted Weyl semimetals CeAl(Ge0.7Si0.3), CeAl(Ge0.3Si0.7) and (Ce0.7Pr0.3)Al(Ge0.7Si0.3) in order to understand the magnetic ground states of these topologically interesting materials and understand the precise effect of chemical substitution on their topological magnetism.