Intrinsic ferromagnetism in quasi two-dimensional chromium telluride nanoplates*

The recent demonstration of ferromagnetic order in atomically thin crystals has opened many new opportunities to study two-dimensional (2D) magnetism for novel spintronic applications. Most of the 2D magnets realized so far are van der Waals materials. In this talk, we report on the chemical vapor deposition and magnetic studies of thin nanoplates of chromium telluride, a layered magnetic material with a non-van der Waals structure. Bulk magnetization and magneto-optic Kerr effect (MOKE) measurements demonstrate a ferromagnetic order below a T_c of ~ 180 K and a strong magnetic anisotropy with an easy axis along the c-axis. We will discuss how the magnetic properties are influenced by the nanoplate thickness based on MOKE measurement of individual nanoplates. We will also discuss in detail the aging effect at ambient conditions, one of the major challenges of 2D magnets with regards to practical applications.