Controllable CVD Growth of 2D Cr 5 Te 8 Nanosheets with Thickness-Dependent Magnetic Domains.

As a unique 2D magnetic material with self-intercalated structure, Cr 5 Te 8 exhibits many intriguing magnetic properties. While its ferromagnetism of Cr 5 Te 8 has been previously reported, the research on its magnetic domain remains unexplored. Herein, we have successfully fabricated 2D Cr 5 Te 8 nanosheets with controlled thickness and lateral size by chemical vapor deposition (CVD). Then magnetic property measurement system revealed Cr 5 Te 8 nanosheets exhibiting intense out-of-plane ferromagnetism with a Curie temperature ( T C ) of 176 K. Significantly, we reported for the first time two magnetic domains: magnetic bubbles and thickness-dependent maze-like magnetic domains in our Cr 5 Te 8 nanosheets by cryogenic magnetic force microscopy (MFM). The domain width of the maze-like magnetic domains increases rapidly with decreasing sample thickness; meanwhile, the domain contrast decreases. This indicates the dominant role of ferromagnetism shifts from dipolar interactions to magnetic anisotropy. Our research not only establishes a pathway for the controllable growth of 2D magnetic materials but also points toward novel avenues for regulating magnetic phases and methodically tuning domain characteristics.