Atomic Displacements Enabling the Observation of the Anomalous Hall Effect in a Non‐Collinear Antiferromagnet

• DOI: 10.1002/adma.202209616
• Publication Date: 2023-03-30T22:23:40Z
• Authors: Berthold H. Rimmler; Binoy K. Hazra; Banabir Pal; Katayoon Mohseni; James M. Taylor; Amilcar Bedoya‐Pinto; Hakan Deniz; Malleswararao Tangi; Ilya Kostanovskiy; Chen Luo; Robin R. Neumann; Arthur Ernst; Florin Radu; Ingrid Mertig; Holger L. Meyerheim; Stuart S. P. Parkin
• Keywords: Spin canting; Tetragonal crystal system

Antiferromagnets with non-collinear spin structures display various properties that make them attractive for spintronic devices. Some of the most interesting examples are an anomalous Hall effect despite negligible magnetization and a unusual polarization directions. However, these effects can only be observed when sample is set predominantly into single antiferromagnetic domain state. This achieved compensated structure perturbed displays weak moments due to canting allows external control. In thin films cubic antiferromagnets, this imbalance previously assumed require tetragonal distortions induced by substrate strain. Here, it shown in Mn3 SnN GaN, structural symmetry lowering large displacements magnetic manganese atoms away from high-symmetry positions. These remain hidden X-ray diffraction probing lattice metric measurement scattering vectors resolve local atomic SnN, net enable observation temperature dependence, which conjectured result bulk-like temperature-dependent coherent rotation within kagome plane.