  As a typical 2D magnetic material with self-intercalated structure, Cr5Te8
exhibits many fascinating magnetic properties. Although the ferromagnetism of
2D Cr5Te8 has been reported, the study of its magnetic domain is still blank.
Herein, we successfully fabricated 2D Cr5Te8 nanosheets with controlled
thickness and lateral size by chemical vapor deposition (CVD). Then magnetic
property measurement system suggested Cr5Te8 nanosheets possessing intense
out-of-plane ferromagnetism with the Curie temperature of 179 K. Most
importantly, we found magnetic bubbles and thickness-dependent maze-like
magnetic domains by cryogenic magnetic force microscopy (MFM) for the first
time. The domain width of the maze-like magnetic domains increases rapidly with
decreasing sample thickness, while domain contrast decreases. This indicates
dipolar interaction is the dominant role over exchange interaction and magnetic
anisotropy. Our work not only paves a way for the controllable growth of 2D
magnetic materials, but also suggests new directions for controlling magnetic
phases and systematically adjusting domain properties.
