Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin films
- Title
- Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin films
- Author
- 천상모
- Keywords
- PHASE; OXIDE
- Issue Date
- 2018-09
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v. 98, no. 12, Article no. 125103
- Abstract
- Ferroic domain walls (DWs) create different symmetries and ordered states compared with those in singledomain bulk materials. In particular, the DWs of an antiferromagnet with noncoplanar spin structure have a distinct symmetry that cannot be realized in those of their ferromagnet counterparts. In this paper, we show that an unconventional anomalous Hall effect (AHE) can arise from the DWs of a noncoplanar antiferromagnet, Nd2Ir2O7. Bulk Nd2Ir2O7 has a cubic symmetry; thus, its Hall signal should be zero without an applied magnetic field. The DWs generated in this material break the twofold rotational symmetry, which allows for finite anomalous Hall conductivity. A strong f-d exchange interaction between the Nd and Ir magnetic moments significantly influences antiferromagnetic (AFM) domain switching. Our epitaxial Nd2Ir2O7 thin film showed a large enhancement of the AHE signal when the AFM domains switched, indicating that the AHE is mainly due to DWs. Our paper highlights the symmetry-broken interface of AFM materials as a means of exploring topological effects and their relevant applications.
- URI
- https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.125103https://repository.hanyang.ac.kr/handle/20.500.11754/120059
- ISSN
- 2469-9950; 2469-9969
- DOI
- 10.1103/PhysRevB.98.125103
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML