  All-optical switching (AOS) of magnetic materials describes the reversal of
the magnetization using short (femtosecond) laser pulses, and has been observed
in a variety of materials. In the past decade it received extensive attention
due to its high potential for fast and energy-efficient data writing in future
spintronic memory applications. Unfortunately, the AOS mechanism in the
ferromagnetic multilayers commonly used in spintronics needs multiple pulses
for the magnetization reversal, losing its speed and energy efficiency. Here,
we experimentally demonstrate `on-the-fly' single-pulse AOS in combination with
spin Hall effect (SHE) driven motion of magnetic domains in Pt/Co/Gd
synthetic-ferrimagnetic racetracks. Moreover, using field-driven-SHE-assisted
domain wall (DW) motion measurements, both the SHE efficiency in the racetrack
is determined and the chirality of the optically written DW's is verified. Our
experiments demonstrate that Pt/Co/Gd racetracks facilitate both single-pulse
AOS as well as efficient SHE induced domain wall motion, which might ultimately
pave the way towards integrated photonic memory devices.
