Van der Waals Epitaxial Growth of 2D Layered Room‐Temperature Ferromagnetic CrS2. Issue 30 (13th September 2022) - Xiao, Han
Abstract: 2D magnetic materials have been attracting enormous interest for both fundamental research and potential spintronic applications. Here, this work demonstrates the van der Waals epitaxial growth of air‐stable 2D magnetic CrS2 on mica substrate by chemical vapor deposition (CVD). The layered nature, high crystallinity, stoichiometry, and high‐purity 1T phase of the individual CrS2 crystallites are verified by a series of complementary characterization techniques including atomic force microscope, scanning transmission electron microscope and energy dispersive X‐ray spectroscopy. The single‐crystalline 1T‐phase CrS2 crystallites exhibit a metallic nature with a moderate conductivity of 1.78 × 10 2 S m −1 and a room‐temperature ferromagnetism with a coercive field of 28.7 Oe. The CVD growth of the air‐stable CrS2 crystallites with 1T phase and high crystallinity offer a new platform for the further physics research and spintronic device applications. Abstract : The van der Waals epitaxial growth of CrS2 nanoflakes with thicknesses down to 1.5 nm are realized via a Te‐assisted chemical vapor deposition routine. Structure and phase characterization confirm the Cr and S stoichiometric ratio of ≈1:2 with a 1T phase layered structure, and a room‐temperature ferromagnetic signal is also revealed in the superconducting quantum interference device test.