  The discovery of ferroelectricity in AlScN allowed the first clear
observation of the effect in the wurtzite crystal structure, resulting in a
material with a previously unprecedented combination of very large coercive
fields (2-5 MV/cm) and remnant polarizations (70-110 ${\mu}$C/cm$^2$). We
obtained initial insight into the switching dynamics of AlScN, which suggests a
domain wall motion limited process progressing from the electrode interfaces.
Further, imprint was generally observed in AlScN films and can tentatively be
traced to the alignment of charged defects with the internal and external
polarization and field, respectively. Potentially crucial from the application
point of view, ferroelectricity could be observed in films with thicknesses
below 30 nm - as the coercive fields of AlScN were found to be largely
independent of thickness between 600 nm and 27 nm.
