Neutron diffraction and small-angle scattering
We will explore the phase diagrams of two classes of novel materials exhibiting nontrivial magnetically ordered phases. The first host spin spirals or skyrmion lattices, over a broad range of external parameters, including high magnetic fields and pressures. The materials of interest will include, among others, magnetoelectric multiferroics and noncentrosymmetric helimagnets. The second are lanthanide and actinide-based heavy-fermion compounds located near a magnetic instability, and iron-based high temperature superconductors.