Strain engineering of the magnetic multipole moments and anomalous Hall effect in pyrochlore iridate thin films.

ABSTRACT: The recent observation of the anomalous Hall effect (AHE) without notable magnetization in antiferromagnets has suggested that ferromagnetic ordering is not a necessary condition. Thus, recent theoretical studies have proposed that higher-rank magnetic multipoles formed by clusters of spins (cluster multipoles) can generate the AHE without magnetization. Despite such an intriguing proposal, controlling the unconventional AHE by inducing these cluster multipoles has not been investigated. Here, we demonstrate that strain can manipulate the hidden Berry curvature effect by inducing the higher-rank cluster multipoles in spin-orbit-coupled antiferromagnets. Observing the large AHE on fully strained antiferromagnetic Nd₂Ir₂O₇ thin films, we prove that strain-ind

SUBMITTER: Kim WJ 

PROVIDER: S-EPMC7439458 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature