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We demonstrate room-temperature ferromagnetism with in-plane magneticanisotropy in thin flakes of the CrTe$_2$ van der Waals ferromagnet. Usingquantitative magnetic imaging with a single spin magnetometer based on anitrogen-vacancy defect in diamond, we infer a room-temperature in-planemagnetization in the range of $M\sim 27$ kA/m for flakes with thicknesses downto $20$ nm. In addition, our measurements indicate that the orientation of themagnetization is not determined solely by shape anisotropy in micron-sizedCrTe$_2$ flakes, which suggest the existence of a non-negligiblemagnetocrystalline anisotropy. These results make CrTe$_2$ a unique system inthe growing family of van der Waals ferromagnets, as it is the only materialplatform known to date which offers an intrinsic in-plane magnetization and aCurie temperature above $300$ K in thin flakes.

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