Evidence of non-collinear spin texture in magnetic moiré superlattices

Moir\'e magnetism, parallel with moir\'e electronics that has led to novel correlated and topological electronic states, emerges as a new venue design control exotic magnetic phases in twisted two-dimensional(2D) crystals. Here, we report direct evidence of noncollinear spin texture 2D double bilayer (tDB) magnet chromium triiodide (CrI$_3$). Using magneto-optical spectroscopy tDB CrI$_3$, revealed the presence net magnetization, unexpected from composing antiferromagnetic bilayers compensated magnetizations, emergence spins, originated exchange coupling-induced frustrations. Exploring twist angle dependence, demonstrated both features are present CrI$_3$ angles 0.5$^o$ 5$^o$, but most prominent 1.1$^o$ CrI$_3$. Focusing on temperature dependence resolved dramatic suppression magnetization onset significant softening result induced frustration. Our results demonstrate power superlattices introducing phenomena absent natural magnets.