Universal Reconstruction of Magnetic Profile in Self-Intercalated van der Waals Magnet Cr(1+δ)Te₂

Understanding magnetic structures in two-dimensional (2D) van der Waals (vdW) magnets is crucial for advancing spintronics through controllable magnetism at the nanoscale. Yet quantitatively determining local magnetic moments and their orientations in these materials remains challenging. Using quantum sensors based on nitrogen-vacancy (NV) centers in diamond, we map the stray fields from room-temperature 2D ferromagnet, self-intercalated Cr(1+δ)Te₂, using both wide-field and scanning NV microscopy. We then introduce a universal reconstruction framework with minimal prior assumptions to directly recover the sample magnetization from the measured fields. The reconstructed magnetization reveals a novel multi-domain texture at room temperature. Our results showcase an accurate, versatile reconstruction approach for quantitative imaging of complex magnetic structures in vdW magnets and related materials.