  The interfacial Dzyaloshinskii-Moriya interaction (DMI) is intimately related
to the prospect of superior domain-wall dynamics and the formation of magnetic
skyrmions. Although some experimental efforts have been recently proposed to
quantify these interactions and the underlying physics, it is still far from
trivial to address the interfacial DMI. Inspired by the reported tilt of the
magnetization of the side edge of a thin film structure, we here present a
quasi-static, straightforward measurement tool. By using laterally asymmetric
triangular-shaped microstructures, it is demonstrated that interfacial DMI
combined with an in-plane magnetic field yields a unique and significant shift
in magnetic hysteresis. By systematic variation of the shape of the triangular
objects combined with a droplet model for domain nucleation, a robust value for
the strength and sign of interfacial DMI is obtained. This method gives
immediate and quantitative access to DMI, enabling a much faster exploration of
new DMI systems for future nanotechnology.
