Tailoring Magnetic Structure and Hall Effect in the Chiral Magnet Co1/3TaS2 via Chemical Substitution

The layered chiral magnet Co1/3TaS2 has attracted significant interest due to its noncollinear spin texture and large anomalous Hall effect arising from intrinsic Berry curvature. Controlling its magnetic ground state is crucial for both fundamental understanding and potential spintronic applications. In this work, we demonstrate systematic tuning of the magnetic and electronic properties of Co1/3TaS2 through targeted chemical substitutions, including Nb, Se, and Fe. These dopants induce substantial modifications to magnetic anisotropy, transition temperature, and Hall response, revealing pathways to engineer topological transport phenomena. Neutron diffraction experiments directly confirm that the magnetic structure evolves with chemical substitution. Our results establish chemically tunedCo1/3TaS2 as a versatile platform for exploring emergent magnetic phases and designing materials with controllable anomalous Hall effects.