The proposal deals with compounds belonging to the ZrCuSiAs structure type that received renewed attention after the discovery and development of Fe-based superconductors. In the proposed experiment, we seek to extend our knowledge on the interplay between magnetic rare-earth ions and magnetic instabilities in transition metal-based antifluorite layers. By resolving magnetic structures, we should be able to explain magnetic behavior of EuTSbF (T = Zn, Mn) microscopically.