Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin filmsopen access
- Authors
- Kim, Woo Jin; Gruenewald, John H.; Oh, Taekoo; Cheon, Sangmo; Kim, Bongju; Korneta, Oleksandr B.; Cho, Hwanbeom; Lee, Daesu; Kim, Yoonkoo; Kim, Miyoung; Park, Je-Geun; Yang, Bohm-Jung; Seo, Ambrose; Noh, Tae Won
- Issue Date
- Sep-2018
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.98, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 98
- Number
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149429
- DOI
- 10.1103/PhysRevB.98.125103
- ISSN
- 2469-9950
- 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.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 자연과학대학 > 서울 물리학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/149429)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.