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Materials with perpendicular magnetic anisotropy (PMA) effect with high Curietemperature ($T_C$) is essential in applications. In this work, $Cr_2Te_3$ thinfilms showing PMA with $T_C$ ranging from 165 K to 295 K were successfullygrown on $Al_2O_3$ by the molecular beam epitaxy (MBE) technique. Thestructural analysis, magneto-transport and magnetic characterizations wereconducted to study the physical origin of the improved $T_C$. In particular,ferromagnetic (FM) and antiferromagnetic (AFM) ordering competition wereinvestigated. A phenomenological model based on the coupling degree between FMand AFM ordering was proposed to explain the observed $T_C$ enhancement. Ourfindings indicate that the $T_C$ of $Cr_2Te_3$ thin film can be tuned, whichmake it hold the potential for various magnetic applications.

Molecular Beam Epitaxy Grown $Cr_2Te_3$ Thin Films with Tunable Curie Temperatures