The functionality of magnetic heterostructures is strongly affected by the interface structure and
morphology as well as by the crystalline quality. Fe/V superlattices serve as model systems for exchange coupling and for superconducting spin valves. We show that the excellent interfacial properties can be further improved by hydrogen assisted
growth. The role of the hydrogen is twofold. It reduces variations of the layer thickness
and improves the crystalline quality. Sputter deposited Fe/V superlattices grown at a partial
pressure of 2 * 10-6 mbar are atomically flat and possess a residual resistivity ratio which
is significantly improved as compared to those of conventionally grown samples.
The same approach can be also used to lower the deposition temperatures of single layers
where interdiffusion with the substrate is a problem. In the iron on germanium system conventional growth methods face significant challenges due to strong intermixing at elevated temperatures. Hydrogen assisted growth might open interesting routes here.