Zero‐Field Anomalous Hall Effect in Bulk Single Crystal Mn ₃ Ir

The L1₂-phase noncollinear antiferromagnet (AFM) Mn₃Ir has emerged as a pioneering platform for realizing the zero-field giant anomalous Hall effect (AHE), thereby catalyzing the rapid advancement of antiferromagnetic spintronics. Despite its significant potential, the experimental investigation of the intrinsic magnetic and electronic properties of Mn₃Ir has been greatly hindered, primarily due to the formidable challenges associated with the growth of bulk single crystals. Here, the successful growth of stoichiometric Mn₃Ir bulk single crystals and characterization on the magnetization and AHE is reported. The (111)-oriented hexagonal Mn₃Ir single crystals are successfully obtained using a high-throughput flux method. The smaller AHE is successfully detected. Intriguing results are attributed to the coexistence of A-domain and B-domain antiferromagnetic domains mutually cancelling the AHE response. This work reveals the key details of the intrinsic magnetic properties and AHE in bulk Mn₃Ir. This provides a key material for the development of advanced antiferromagnetic spintronic devices.