  Various and spontaneous magnetic skyrmionic bubbles are experimentally
observed for the first time, at room temperature in a frustrated kagome magnet
Fe3Sn2 with unixial magnetic anisotropy. The magnetization dynamics were
investigated using in-situ Lorentz transmission electron microscopy, revealing
that the transformation between different magnetic bubbles and domains are via
the motion of Bloch lines driven by applied external magnetic field. The
results demonstrate that Fe3Sn2 facilitates a unique magnetic control of
topological spin textures at room temperature, making it a promising candidate
for further skyrmion-based spintronic devices.
