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

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Abstract The L1 2 ‐phase noncollinear antiferromagnet (AFM) Mn 3 Ir 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 Mn 3 Ir has been greatly hindered, primarily due to the formidable challenges associated with the growth of bulk single crystals. Here, the successful growth of stoichiometric Mn 3 Ir bulk single crystals and characterization on the magnetization and AHE is reported. The (111)‐oriented hexagonal Mn 3 Ir 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 Mn 3 Ir. This provides a key material for the development of advanced antiferromagnetic spintronic devices.

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