Imaging Local Magnetism of Room-temperature 2D Magnet Using a Quantum Diamond Microscope

Recent advances in precision magnetometry, especially in using solid-state spin defects as quantum sensors, have been instrumental in elucidating the magnetic characteristics of two-dimensional (2D) materials. Here, we employ widefield nitrogen-vacancy (NV) centers based magnetometry to study the magnetic properties of room-temperature ferromagnet Cr_1+δTe₂.Upon zero-field cooling (ZFC), the sample is measured to exhibit in-plane magnetization below the Currie temperature (T_c) of approximately 315K. Interestingly, for field cooling (FC), we discover a quite distinct and complex magnetic structures. We aim at comprehensively reconstructing and understanding the spin texture of this novel room-temperature vdW magnet by using stray magnetic fields sensed by NV centers.