  Materials with perpendicular magnetic anisotropy (PMA) effect with high Curie
temperature ($T_C$) is essential in applications. In this work, $Cr_2Te_3$ thin
films showing PMA with $T_C$ ranging from 165 K to 295 K were successfully
grown on $Al_2O_3$ by the molecular beam epitaxy (MBE) technique. The
structural analysis, magneto-transport and magnetic characterizations were
conducted to study the physical origin of the improved $T_C$. In particular,
ferromagnetic (FM) and antiferromagnetic (AFM) ordering competition were
investigated. A phenomenological model based on the coupling degree between FM
and AFM ordering was proposed to explain the observed $T_C$ enhancement. Our
findings indicate that the $T_C$ of $Cr_2Te_3$ thin film can be tuned, which
make it hold the potential for various magnetic applications.
