Characterization of room-temperature in-plane magnetization in thin flakes of CrTe${}_2$ with a single spin magnetometer

Abstract

We demonstrate room-temperature ferromagnetism with in-plane magnetic anisotropy in thin flakes of the CrTe${}_2$ van der Waals ferromagnet. Using quantitative magnetic imaging with a single spin magnetometer based on a nitrogen-vacancy defect in diamond, we infer a room-temperature in-plane magnetization in the range of $M\sim 27$ kA/m for flakes with thicknesses down to $20$ nm. In addition, our measurements indicate that the orientation of the magnetization is not determined solely by shape anisotropy in micron-sized CrTe${}_2$ flakes, which suggest the existence of a non-negligible magnetocrystalline anisotropy. These results make CrTe${}_2$ a unique system in the growing family of van der Waals ferromagnets, as it is the only material platform known to date which offers an intrinsic in-plane magnetization and a Curie temperature above $300$ K in thin flakes.

9 pages, 5 figures

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• Stability of the In-Plane Room Temperature van der Waals Ferromagnet Chromium Ditelluride and Its Conversion to Chromium-Interleaved CrTe${}_2$ Compounds
• Anisotropic magnetic properties and tunable conductivity in two-dimensional layered NaCrX2 (X=Te,Se,S) single crystals
• Bilayer orthogonal ferromagnetism in CrTe${}_2$-based van der Waals system
• Quantum thermodynamic derivation of the energy resolution limit in magnetometry
• Efficient Soft-Chemical Synthesis of Large van-der-Waals Crystals of the Room-Temperature Ferromagnet 1T-CrTe2
• Magnetic properties of monolayer, multilayer, and bulk CrTe${}_2$
• Twist Engineering of Anisotropic Excitonic and Optical Properties of a Two-Dimensional Magnetic Semiconductor
• Enhanced Magnetization by Defect-Assisted Exciton Recombination in Atomically Thin CrCl${}_3$
• Interlayer magnetic interactions and ferroelectricity in $\pi$/3-twisted CrX${}_2$ (X = Se, Te) bilayers
• Nitrogen-Vacancy Magnetometry of Edge Magnetism in WS2 Flakes
• Many-body electronic structure, self-doped double-exchange, and Hund metallicity in 1T-CrTe2 bulk and monolayer