Covalent 2D Cr${}_2$Te${}_3$ ferromagnet

Abstract

To broaden the scope of van der Waals 2D magnets, we report the synthesis and magnetism of covalent 2D magnetic Cr${}_2$Te${}_3$ with a thickness down to one-unit-cell. The 2D Cr${}_2$Te${}_3$ crystals exhibit robust ferromagnetism with a Curie temperature of 180 K, a large perpendicular anisotropy of 7*105 J m-3, and a high coercivity of ~ 4.6 kG at 20 K. First-principles calculations further show a transition from canted to collinear ferromagnetism, a transition from perpendicular to in-plane anisotropy, and emergent half-metallic behavior in atomically-thin Cr${}_2$Te${}_3$, suggesting its potential application for injecting carriers with high spin polarization into spintronic devices.

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• Synthesis and physical properties of a new layered ferromagnet, Cr1.21Te2
• Efficient Soft-Chemical Synthesis of Large van-der-Waals Crystals of the Room-Temperature Ferromagnet 1T-CrTe2
• Significant electron-magnon scattering in layered ferromagnet Cr${}_2$Te${}_3$
• In-Plane Magnetic Anisotropy and Large topological Hall Effect in Self-Intercalated Ferromagnet Cr1.61Te2
• Spin reorientations in structurally metastable, disordered, and hexagonal Cr7Te8
• Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale Layered Cr_{2}Te_{3} Films: Implications for Room-Temperature Spintronics