  With the recent proposition of skyrmion utilization in racetrack memories at
room temperature, skyrmionics has become a very attractive field. However, for
the stability of skyrmions, it is essential to incorporate the
Dzyaloshinskii-Moriya interaction (DMI) and the out-of-plane magnetic field
into the system. In this work, we explore a system without these interactions.
First, we propose a controlled way for the creation of magnetic skyrmions and
skyrmioniums imprinted on a ferromagnetic nanotrack via a nanopatterned
nanodisk with the magnetic vortex state. Then we investigate the detachment of
the imprinted spin textures from the underneath of the nanodisk, as well as its
transport by the spin-transfer torque imposed by spin-polarized current pulses
applied in the nanotrack. A prominent feature of the moving imprinted spin
texture is that its topological number Q is oscillating around the averaged
value of Q=0 as if it is a resonant state between the skyrmions with Q= +/- 1
and the bubble with Q=0. We may call it a resonant magnetic soliton (RMS). A
RMS moves along a straight line since it is free from the skyrmion Hall effect.
In our studied device, the same electrodes are employed to realize the
imprinted spin texture detachment and its transport. In addition, we have
investigated the interaction between the RMS and a magnetic tunnel junction
sensor, where the passing of the RMS in the nanotrack can be well detected. Our
results would be useful for the development of novel spintronic devices based
on moveable spin textures.
