Electric-field control of spin dynamics during magnetic phase transitions
- Authors
- Nan, Tianxiang; Lee, Yeonbae; Zhuang, Shihao; Hu, Zhongqiang; Clarkson, JD (Clarkson, James; Wang, Xinjun; Ko, Changhyun); Choe, HwanSung; Chen, Zuhuang; Budil, David; Wu, Junqiao; Salahuddin, Say; Hu, Jiamian; Ramesh, Ramamoorthy; Sun, Nian
- Issue Date
- Oct-2020
- Publisher
- AMER ASSOC ADVANCEMENT SCIENCE
- Citation
- SCIENCE ADVANCES, v.6, no.40, pp 1 - 6
- Pages
- 6
- Journal Title
- SCIENCE ADVANCES
- Volume
- 6
- Number
- 40
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/151321
- DOI
- 10.1126/sciadv.abd2613
- ISSN
- 2375-2548
2375-2548
- Abstract
- Controlling magnetization dynamics is imperative for developing ultrafast spintronics and tunable microwave devices. However, the previous research has demonstrated limited electric-field modulation of the effective magnetic damping, a parameter that governs the magnetization dynamics. Here, we propose an approach to manipulate the damping by using the large damping enhancement induced by the two-magnon scattering and a nonlocal spin relaxation process in which spin currents are resonantly transported from antiferromagnetic domains to ferromagnetic matrix in a mixed-phased metallic alloy FeRh. This damping enhancement in FeRh is sensitive to its fraction of antiferromagnetic and ferromagnetic phases, which can be dynamically tuned by electric fields through a strain-mediated magnetoelectric coupling. In a heterostructure of FeRh and piezoelectric PMN-PT, we demonstrated a more than 120% modulation of the effective damping by electric fields during the antiferromagnetic-to-ferromagnetic phase transition. Our results demonstrate an efficient approach to controlling the magnetization dynamics, thus enabling low-power tunable electronics.
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