  In the last decade, two revolutionary concepts in nano magnetism emerged from
research for storage technologies and advanced information processing. The
first suggests the use of magnetic domain walls (DWs) in ferromagnetic
nanowires to permanently store information in DW racetrack memories. The second
proposes a hardware realisation of neuromorphic computing in nanomagnets using
nonlinear magnetic oscillations in the GHz range. Both ideas originate from the
transfer of angular momentum from conduction electrons to localised spins in
ferromagnets, either to push data encoded in DWs along nanowires or to sustain
magnetic oscillations in artificial neurones. Even though both concepts share a
common ground, they live on very different time scales which rendered them
incompatible so far. Here, we bridge both ideas by demonstrating the excitation
of magnetic auto-oscillations inside nano-scale DWs using pure spin currents.
