Magnetic Anisotropy of a Quasi Two-Dimensional Canted Antiferromagnet.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32004008.
- Also identified by DOI 10.1021/acs.nanolett.9b05120.
- 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
We report the control of the interplane magnetic exchange coupling in CaIrO<sub>3</sub> perovskite thin films and superlattices with SrTiO<sub>3</sub>. By analyzing the anisotropic magneto-transport data, we demonstrate that a semimetallic paramagnetic CaIrO<sub>3</sub> turns into a canted antiferromagnetic Mott insulator at reduced dimensions. The emergence of a biaxial magneto-crystalline anisotropy indicates the canted moment responding to the cubic symmetry. Extending to superlattices and probing oxygen octahedral rotation by half-integer X-ray Braggs diffraction, a more complete picture about the canted moment evolution with interplane coupling can be understood. Remarkably, a rotation of the canted moments' easy axes by 45° is also observed by a sign reversal of the in-plane strain. These results demonstrate the robustness of anisotropic magnetoresistance in revealing quasi two-dimensional canted antiferromagnets, as well as valuable insights about quadrupolar magnetoelastic coupling, relevant for designing future antiferromagnetic spintronic devices.