Giant nonreciprocal emission of spin waves in Ta/Py bilayers
- Authors
- Kwon, Jae Hyun; Yoon, Jungbum; Deorani, Praveen; Lee, Jong Min; Sinha, Jaivardhan; Lee, Kyung-Jin; Hayashi, Masamitsu; Yang, Hyunsoo
- Issue Date
- 7월-2016
- Publisher
- AMER ASSOC ADVANCEMENT SCIENCE
- Citation
- SCIENCE ADVANCES, v.2, no.7
- Indexed
- SCOPUS
- Journal Title
- SCIENCE ADVANCES
- Volume
- 2
- Number
- 7
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/88173
- DOI
- 10.1126/sciadv.1501892
- ISSN
- 2375-2548
- Abstract
- Spin waves are propagating disturbances in themagnetization of magnetic materials. One of their interesting properties is nonreciprocity, exhibiting that their amplitude depends on themagnetization direction. Nonreciprocity in spin waves is of great interest in both fundamental science and applications because it offers an extra knob to control the flow of waves for the technological fields of logics and switch applications. We show a high nonreciprocity in spin waves from Ta/Py bilayer systems with out-of-plane magnetic fields. The nonreciprocity depends on the thickness of Ta underlayer, which is found to induce an interfacial anisotropy. The origin of observed high nonreciprocity is twofold: different polarities of the in-planemagnetization due to different angles of canted out-of-plane anisotropy and the spin pumping effect at the Ta/Py interface. Our findings provide an opportunity to engineer highly efficient, nonreciprocal spin wave-based applications, such as nonreciprocal microwave devices, magnonic logic gates, and information transports.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.