Article
Multidisciplinary Sciences
Cuimei Cao, Shiwei Chen, Rui-Chun Xiao, Zengtai Zhu, Guoqiang Yu, Yangping Wang, Xuepeng Qiu, Liang Liu, Tieyang Zhao, Ding-Fu Shao, Yang Xu, Jingsheng Chen, Qingfeng Zhan
Summary: Cubic materials are not expected to exhibit anisotropy in transport phenomena, but we report an anomalous anisotropy of spin current in the (001) film of the noncollinear antiferromagnetic spin source Mn3Pt. This anisotropy originates from the intertwined time reversal-odd and time reversal-even spin Hall effects. By analyzing the symmetry and characterizing the current-induced spin torques in Mn3Pt-based heterostructures, we find that the spin current in Mn3Pt (001) exhibits exotic dependencies on the current direction for all spin components, deviating from that in conventional cubic systems.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yongcheng Deng, Weihao Li, Xiukai Lan, Enze Zhang, Runze Li, Yaxuan Shang, Shuai Liu, Baohe Li, Xionghua Liu, Houzhi Zheng, Kaiyou Wang
Summary: Field-free magnetization switching is achieved in spin orbit torque crossbar array devices. The mechanism of this switching is revealed through analyzing the current distribution and micromagnetic simulations. The demonstration of tristate switching and write protection is significant for the study and application of spin crossbar array devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Jeongchun Ryu, Ryan Thompson, Jae Yeol Park, Seok-Jong Kim, Gaeun Choi, Jaimin Kang, Han Beom Jeong, Makoto Kohda, Jong Min Yuk, Junsaku Nitta, Kyung-Jin Lee, Byong-Guk Park
Summary: Spin-orbit coupling converts charge current into spin current, generating spin-orbit torque. Previous studies only used part of the polarization of the spin current, while this study demonstrates a method that utilizes all three polarizations. This approach reduces the switching current for field-free spin-orbit torque and is applicable for mass production.
NATURE ELECTRONICS
(2022)
Article
Physics, Applied
Jean-Lois Bello, Yassine Quessab, Jun-Wen Xu, Maxime Verges, Heloise Damas, Sebastien Petit-Watelot, Juan-Carlos Rojas Sanchez, Michel Hehn, Andrew D. Kent, Stephane Mangin
Summary: In this study, the switching of magnetization in Ir/GdFeCo/Cu/Pt heterostructures is observed at zero applied magnetic field, which is shown to be a result of the competition between spin-orbit torque, the Oersted field generated by the charge current, and the coercivity of the material. This finding provides a new approach for the design of future spintronics devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Liang Liu, Chenghang Zhou, Tieyang Zhao, Bingqing Yao, Jing Zhou, Xinyu Shu, Shaohai Chen, Shu Shi, Shibo Xi, Da Lan, Weinan Lin, Qidong Xie, Lizhu Ren, Zhaoyang Luo, Chao Sun, Ping Yang, Er-Jia Guo, Zhili Dong, Aurelien ManchonHD, Jingsheng Chen
Summary: This study discovers the possibility of field-free switching of perpendicular magnetization within a specific range of CoxPt100-x composition, which can potentially simplify the design of magnetic devices.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Qidong Xie, Weinan Lin, Soumya Sarkar, Xinyu Shu, Shaohai Chen, Liang Liu, Tieyang Zhao, Chenghang Zhou, Han Wang, Jing Zhou, Silvija Gradecak, Jingsheng Chen
Summary: In this study, deterministic switching of perpendicular magnetization is achieved in the SrRuO3/WTe2 bilayer structure, attributed to the out-of-plane spin polarization from the van der Waals material WTe2. Analysis of the spin polarization matrix indicates that the reduced crystal symmetry in WTe2 is responsible for the out-of-plane spin polarization.
Article
Multidisciplinary Sciences
Min-Gu Kang, Jong-Guk Choi, Jimin Jeong, Jae Yeol Park, Hyeon-Jong Park, Taehwan Kim, Taekhyeon Lee, Kab-Jin Kim, Kyoung-Whan Kim, Jung Hyun Oh, Duc Duong Viet, Jong-Ryul Jeong, Jong Min Yuk, Jongsun Park, Kyung-Jin Lee, Byong-Guk Park
Summary: The study demonstrates that electric field control of the Rashba effect in Pt/Co/AlOx structures can enable control of the spin-orbit torque and field-free switching of magnetization, providing a new method for electric field modulation of magnetism.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
I-Hsuan Kao, Ryan Muzzio, Hantao Zhang, Menglin Zhu, Jacob Gobbo, Sean Yuan, Daniel Weber, Rahul Rao, Jiahan Li, James H. Edgar, Joshua E. Goldberger, Jiaqiang Yan, David G. Mandrus, Jinwoo Hwang, Ran Cheng, Jyoti Katoch, Simranjeet Singh
Summary: This paper demonstrates the experimental realization of field-free deterministic magnetic switching using the out-of-plane antidamping spin-orbit torque in the quantum material WTe2, and confirms this phenomenon through numerical simulations. This is of great importance for next-generation spintronic applications.
Article
Materials Science, Multidisciplinary
Huawei Sun, Luming Cheng, Jiawei Xu, Changhao Yu, Haibo Xiao, Ruilong Wang, Lingfang Xu, Zhongming Zeng, Shiheng Liang
Summary: This study demonstrates the current-induced SOT magnetization switching using a combination of non-collinear spin moments mixed by Rashba-like Sy, Dresselhaus-like Sx, and out-of-plane like Sz through micromagnetic simulation. The results show that the current induced out-of-plane spin moment and Dresselhaus-like spin moments can effectively contribute unconventional torque for magnetization switching at zero magnetic field, providing new insights for the potential application of spintronics devices.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lei Chen, Kun Zhang, Bo Li, Bin Hong, Wentao Huang, Yu He, Xueqiang Feng, Zhizhong Zhang, Kelian Lin, Weisheng Zhao, Yue Zhang
Summary: A series of Pt/Co multilayers with invariable thickness gradient and varying ferromagnet thickness (tFM) are fabricated to explore the mechanism and efficient switching of bulk spin-orbit torque (BSOT). Results show that as tFM increases, the critical current density decreases while the switching efficiency and spin Hall angle enlarges, indicating the superiority of BSOT. X-ray absorption spectroscopy (XAS) measurements reveal that increasing the stacking number can effectively introduce strong interfacial spin-orbit coupling at the Pt/Co interface.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Computer Science, Information Systems
Yucai Li, Nan Zhang, Kaiyou Wang
Summary: Spintronic devices based on spin orbit torques offer advantages in low power consumption, high speed, reconfigurability, and high endurance. By designing a local spin current gradient, magnetization can be switched deterministically without external magnetic field. Experimental results demonstrate the feasibility of field-free deterministic current-induced magnetization switching and logic gates based on these devices.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Youngmin Lim, Behrouz Khodadadi, Jie-Fang Li, Dwight Viehland, Aurelien Manchon, Satoru Emori
Summary: In this study, the dephasing length of transverse spin current in ferrimagnetic CoGd alloys was estimated, showing that it is about 4-5 times longer in nearly compensated CoGd than in ferromagnetic metals. The finding suggests that antiferromagnetic order can mitigate spin dephasing and that transverse spin current interacts more strongly with the Co sublattice. These results provide fundamental insights into the interplay between spin current and antiferromagnetic order for engineering spin torque effects in ferrimagnetic and antiferromagnetic metals.
Article
Physics, Applied
Xupeng Zhao, Siwei Mao, Hailong Wang, Dahai Wei, Jianhua Zhao
Summary: This study reports spin-orbit torque-induced magnetization switching in L1(0)-MnGa/FeMn/Pt trilayers, utilizing an antiferromagnetic FeMn layer to achieve field-free spin-orbit torque switching. The research found that the spin transmission efficiency decreases monotonically with increasing FeMn thickness, with a peak in the damping-like spin-orbit torque efficiency at 1.5nm FeMn thickness. These results demonstrate the effectiveness of emerging spintronic devices containing antiferromagnetic elements.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Yunzhuo Wu, Xiaoxue Zeng, Yonghai Guo, Qi Jia, Bo Wang, Jiangwei Cao
Summary: The study investigated spin-orbit torque (SOT) effect and magnetization switching in Pt/Co-Tb/Ta structures with various Co-Tb compositions. Results revealed a certain law for current-induced SOT effective fields in the structure, as well as low coercivity near the compensation composition enabling current-induced magnetization switching at a low threshold current density. Direct Kerr imaging verified two different current-induced switching mechanisms in the Pt/Co-Tb/Ta system.
APPLIED PHYSICS LETTERS
(2021)
Review
Physics, Applied
Liang Liu, Tieyang Zhao, Weinan Lin, Xinyu Shu, Jing Zhou, Zhenyi Zheng, Hongliang Chen, Lanxin Jia, Jingsheng Chen
Summary: This article discusses the principles of symmetry considerations for current-induced magnetization switching and methods to break mirror symmetry. It also presents recent progress in this field and discusses the challenges and perspectives of symmetry designs for spin-orbit torque (SOT) in future fundamental studies and device applications.
APPLIED PHYSICS REVIEWS
(2023)
