  Magnetic skyrmion is a promising building block for developing information
storage and computing devices. It can be stabilized in a ferromagnetic thin
film with the Dzyaloshinskii-Moriya interaction (DMI). The moving ferromagnetic
skyrmion may show the skyrmion Hall effect, that is, the skyrmion shows a
transverse shift when it is driven by a spin current. Here, we numerically and
theoretically study the current-driven dynamics of a ferromagnetic nanoscale
skyrmion in the presence of the anisotropic DMI, where the skyrmion has an
elliptical shape. The skyrmion Hall effect of the elliptical skyrmion is
investigated. It is found that the skyrmion Hall angle can be controlled by
tuning the profile of elliptical skyrmion. Our results reveal the relation
between the skyrmion shape and the skyrmion Hall effect, which could be useful
for building skyrmion-based spintronic devices with preferred skyrmion Hall
angle. Also, our results provide a method for the minimization of skyrmion Hall
angle for applications based on in-line motion of skyrmions.
