Journal
ADVANCED MATERIALS
Volume 35, Issue 23, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202209616
Keywords
anomalous Hall effect; non-collinear antiferromagnets; spin rotation; X-ray diffraction
Ask authors/readers for more resources
Antiferromagnets with non-collinear spin structures have attractive properties for spintronic devices, such as anomalous Hall effect and spin Hall effect. However, these effects can only be observed in a single antiferromagnetic domain state, which requires perturbation of the compensated spin structure through spin canting. This study reveals that spin canting in Mn3SnN and Mn3GaN is induced by structural symmetry lowering caused by large displacements of magnetic manganese atoms.
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 spin Hall effect with unusual spin polarization directions. However, these effects can only be observed when the sample is set predominantly into a single antiferromagnetic domain state. This can only be achieved when the compensated spin structure is perturbed and displays weak moments due to spin canting that allows for external domain control. In thin films of cubic non-collinear antiferromagnets, this imbalance is previously assumed to require tetragonal distortions induced by substrate strain. Here, it is shown that in Mn3SnN and Mn3GaN, spin canting is due to structural symmetry lowering induced by large displacements of the magnetic manganese atoms away from high-symmetry positions. These displacements remain hidden in X-ray diffraction when only probing the lattice metric and require measurement of a large set of scattering vectors to resolve the local atomic positions. In Mn3SnN, the induced net moments enable the observation of the anomalous Hall effect with an unusual temperature dependence, which is conjectured to result from a bulk-like temperature-dependent coherent spin rotation within the kagome plane.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available