Emergent zero-field anomalous Hall effect in a reconstructed rutile antiferromagnetic metal.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38086819.
- Also identified by DOI 10.1038/s41467-023-43962-0 and PMC identifier 10716394.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The anomalous Hall effect (AHE) that emerges in antiferromagnetic metals shows intriguing physics and offers numerous potential applications. Magnets with a rutile crystal structure have recently received attention as a possible platform for a collinear-antiferromagnetism-induced AHE. RuO<sub>2</sub> is a prototypical candidate material, however the AHE is prohibited at zero field by symmetry because of the high-symmetry [001] direction of the Néel vector at the ground state. Here, we show AHE at zero field in Cr-doped rutile, Ru<sub>0.8</sub>Cr<sub>0.2</sub>O<sub>2</sub>. The magnetization, transport and density functional theory calculations indicate that appropriate doping of Cr at Ru sites reconstructs the collinear antiferromagnetism in RuO<sub>2</sub>, resulting in a rotation of the Néel vector from [001] to [110] while maintaining a collinear antiferromagnetic state. The AHE with vanishing net moment in the Ru<sub>0.8</sub>Cr<sub>0.2</sub>O<sub>2</sub> exhibits an orientation dependence consistent with the [110]-oriented Hall vector. These results demonstrate that material engineering by doping is a useful approach to manipulate AHE in antiferromagnetic metals.