Thin films and nanostructures are of increasing interest both for applications and from a fundamental point of view. Using molecular beam epitaxy we grow heterostructures of B20 transition metal silicides and germanides (MnSi, MnGe, FeGe, etc.) as well as superconductors and helical magnets. We are interested in the magnetic and transport properties of low dimensional structures and in proximity effects at the interface between superconductors and magnets. We aim to expand the skyrmion phase to a large region of the magnetic phase diagram and investigate the coupling between skyrmions and Abrikosov vortices.