Chemical vapor deposition of large-area ultrathin Cr3Te4 nanosheets with robust ferromagnetism

Abstract Chromium tellurides represent a novel class of two-dimensional ferromagnets with significant potential for advanced electronic applications, including spintronics and magnonics. Despite their promise, the fabrication of large-area samples remains a considerable challenge. In this study, we report a facile modification to the common ambient-pressure chemical vapor deposition setup that enables the synthesis of ultrathin Cr 3 Te 4 nanosheets (6.4 nm thick) with lateral dimensions exceeding 100 μ m. Our findings reveal that by tuning both the growth temperature and the distance between the precursor and substrate, the size and morphology of the synthesized Cr x Te y nanosheets were significantly impacted. The resulting large-size Cr 3 Te 4 , synthesized under 800 °C, exhibits robust ferromagnetism, with a Curie temperature reaching 178 K. This advancement in the preparation of large-area Cr 3 Te 4 nanosheets opens new avenues for their integration into next-generation electronic devices.