Article
Physics, Applied
Lin Liu, Ziqi Fan, Zhiren Chen, Zehan Chen, Zhixiang Ye, Hongnan Zheng, Qi Zeng, Wei Jia, Shuoqi Li, Ning Wang, Jing Liu, Lei Ma, Tao Lin, Mingxia Qiu, Shunpu Li, Peigang Han, Ji Shi, Hongyu An
Summary: This study reports the investigation of SOT in FMI near compensation tuned by temperature. The experiment shows that SOT generation is significantly enhanced near the compensation temperature due to the decrease in net magnetization. The effective spin Hall angle in Pt/GdIG bilayer films is estimated to be around 0.0073, with little dependence on temperature.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Sachin Krishnia, Yanis Sassi, Fernando Ajejas, Nicolas Sebe, Nicolas Reyren, Sophie Collin, Thibaud Denneulin, Andras Kovacs, Rafal E. Dunin-Borkowski, Albert Fert, Jean-Marie George, Vincent Cros, Henri Jaffres
Summary: By inserting a nanometer-thin Al metallic layer in Pt|Co|Al|Pt, we demonstrate that a light metal interface profoundly affects the nature of spin-orbit torques and its efficiency in ultrathin Co films. The unexpectedly large H(FL)/H(DL) ratios suggest the existence of a large Rashba interaction at the Co|Al interface, which is not expected from a metallic interface. The occurrence of enhanced torques from an interfacial origin is further validated by demonstrating current-induced magnetization reversal with a significant decrease in the critical current.
Article
Materials Science, Multidisciplinary
Ariel Zaig, Shubhankar Das, Moty Shultz, Lior Klein
Summary: Using bilayer films of-Ta/Ni0.8Fe0.2, elliptical structures with single magnetic domain behavior are fabricated. Giant response to induced spin-orbit torques is observed in these devices, which is quantitatively correlated with the in-plane angles of the magnetization and the magnetic field during magnetization reversal of the NiFe layer. Theoretical and applicative implications of this behavior are discussed.
Article
Chemistry, Multidisciplinary
David Cespedes-Berrocal, Heloise Damas, Sebastien Petit-Watelot, Davide Maccariello, Ping Tang, Aldo Arriola-Cordova, Pierre Vallobra, Yong Xu, Jean-Lois Bello, Elodie Martin, Sylvie Migot, Jaafar Ghanbaja, Shufeng Zhang, Michel Hehn, Stephane Mangin, Christos Panagopoulos, Vincent Cros, Albert Fert, Juan-Carlos Rojas-Sanchez
Summary: Spintronics utilizes spin-orbit coupling to produce spin currents and torques, often using heavy metals with large SOC. A new material architecture is introduced, demonstrating strong current-induced torques on ferrimagnetic layers due to Gd 5d states and interface engineering. This platform offers new opportunities for self-torquing single magnetic layers and generating spin currents.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Michael Patton, Gautam Gurung, Ding-Fu Shao, Gahee Noh, Joseph A. Mittelstaedt, Marcel Mazur, Jong-Woo Kim, Philip J. Ryan, Evgeny Y. Tsymbal, Si-Young Choi, Daniel C. Ralph, Mark S. Rzchowski, Tianxiang Nan, Chang-Beom Eom
Summary: Spin-orbit torques generated by spin currents play a crucial role in magnetic switching for spintronic applications. The polarization of spin currents determines the required switching direction for energy-efficient devices. While conventional spin currents are limited to certain directions due to material symmetry, unconventional spin-orbit torques arising from novel spin current polarizations have the potential to switch magnetization orientations desired for high-density spintronic memory devices. This study demonstrates that low crystalline symmetry is not necessary for generating unconventional spin-orbit torques, as they can be generated in a nonmagnetic high symmetry material, iridium dioxide (IrO2), through epitaxial design. Understanding and controlling unconventional spin transport in high symmetry materials can open up new possibilities for energy-efficient magnetic switching in spintronic devices.
ADVANCED MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Cheng Song, Ruiqi Zhang, Liyang Liao, Yongjian Zhou, Xiaofeng Zhou, Ruyi Chen, Yunfeng You, Xianzhe Chen, Feng Pan
Summary: The paper reviews recent progress in spin-orbit torque (SOT) in various materials, emphasizing the intrinsic correlation between heterostructures and SOT behaviors. It covers the mechanisms, classification, characterization techniques, and potential applications of SOT.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Weihao Li, Wenkai Zhu, Gaojie Zhang, Hao Wu, Shouguo Zhu, Runze Li, Enze Zhang, Xiaomin Zhang, Yongcheng Deng, Jing Zhang, Lixia Zhao, Haixin Chang, Kaiyou Wang
Summary: In this study, the perpendicular magnetization of the vdW ferromagnet Fe3GaTe2 was successfully switched at room temperature using spin-orbit torques with a relatively low current density. The high efficiency of this method, quantitatively determined by harmonic measurements, provides a significant basis for the development of vdW-ferromagnet-based spintronic applications.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Guoyi Shi, Enlong Liu, Qu Yang, Yakun Liu, Kaiming Cai, Hyunsoo Yang
Summary: The study investigated the spin-orbit torque in PtRh alloy and found that Pt0.9Rh0.1 exhibits high spin torque efficiency and spin Hall conductivity. The critical current density for SOT switching in PtRh alloy decreases as the Rh composition increases.
Article
Physics, Applied
Jonathan Gibbons, Takaaki Dohi, Vivek P. Amin, Fei Xue, Haowen Ren, Jun -Wen Xu, Hanu Arava, Soho Shim, Hilal Saglam, Yuzi Liu, John E. Pearson, Nadya Mason, Amanda K. Petford-Long, Paul M. Haney, Mark D. Stiles, Eric E. Fullerton, Andrew D. Kent, Shunsuke Fukami, Axel Hoffmann
Summary: Spin torque is a promising tool for driving magnetization dynamics for computing technologies. However, crystal symmetry limits the geometry of spin torques for most conventional spin source materials. Magnetic ordering reduces material symmetry and allows for the production of exotic torques, with antiferromagnets being particularly robust against external fields.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Federico Binda, Stefano Fedel, Santos Francisco Alvarado, Paul Noel, Pietro Gambardella
Summary: The study investigates the spin-orbit torques (SOTs) and spin Hall magnetoresistance generated by Bi0.9Sb0.1(0001) when coupled with FeCo, confirming its effectiveness as a spin-injector material. The research finds that charge-to-spin conversion in single-crystal Bi0.9Sb0.1(0001) is isotropic despite the strong anisotropy of the topological surface states. Additionally, the damping-like SOT displays non-monotonic temperature dependence, with a minimum occurring at 20 K.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wendan Zhou, Huanglin Yang, Meng Tang, Xuepeng Qiu
Summary: In this study, the tuning effect of annealing on SOT and PMA in IrMn/CoFeB/MgO/SiO2 heterostructures was investigated. By systematically changing the thicknesses of Co40Fe40B20 and IrMn, and annealing temperature, phase diagrams of PMA were obtained and SOTs were quantified by harmonic Hall voltage measurements. The efficiencies of damping-like and field-like SOT showed nonmonotonic variations with annealing temperature, correlating with device resistivity.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Qian Chen, Qingjie Guo, Zhaocong Huang, Bin Fang, Shangkun Li, Weiming Lv, Rongxin Li, Yi Luo, Jun Du, Baoshun Zhang, Ya Zhai, Yaming Fan, Zhongming Zeng
Summary: We present a study on spin-orbit torques (SOTs) generated by ferrimagnetic FeCoTb alloys in spin valve structures. Our results show high-efficient damping-like and field-like torques and a spin Hall conductivity of FeCoTb that surpasses that of conventional heavy metals. The magnetization dependent behavior of the SOTs, possibly originating from the anomalous Hall effect dominated by Tb magnetization, can be controlled by manipulating the magnetic configuration. This study highlights the potential of ferrimagnetic materials for low-power spintronic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Lijun Zhu, Daniel C. Ralph, Robert A. Buhrman
Summary: The study investigates the mechanism of unexpected bulk spin-orbit torques (SOTs) in magnetic single-layers by utilizing chemically disordered FexPt1-x. It is found that the bulk dampinglike SOT arises from an imbalanced internal spin current and is sensitive to the presence of a vertical composition gradient. The discovery suggests the potential development of low-power single-layer SOT devices through strain engineering.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Giacomo Sala, Pietro Gambardella
Summary: Ferrimagnets, especially rare-earth transition-metal (RE-TM) alloys, exhibit the fastest current-induced dynamics among magnetic materials. Current-induced spin-orbit torques (SOTs) can efficiently switch their magnetization and facilitate fast domain-wall motion. Recent research has shown that the switching process is influenced by significant stochastic fluctuations, but strong SOTs can achieve fast and deterministic sub-nanosecond switching with minimal energy dissipation. Asynchronous responses of the RE and TM magnetizations to SOTs challenge the assumption of rigid inter-sublattice antiferromagnetic coupling. The ability to tailor the timescale and reversal mode of RE-TM alloys offers potential for optimizing the speed of ferrimagnetic spintronic devices and gaining insights into current-induced transfer of angular momentum in systems with ferromagnetic and antiferromagnetic interactions.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Qiming Shao, Peng Li, Luqiao Liu, Hyunsoo Yang, Shunsuke Fukami, Armin Razavi, Hao Wu, Kang Wang, Frank Freimuth, Yuriy Mokrousov, Mark D. Stiles, Satoru Emori, Axel Hoffmann, Johan Akerman, Kaushik Roy, Jian-Ping Wang, See-Hun Yang, Kevin Garello, Wei Zhang
Summary: Spin-orbit torque (SOT) is an emerging technology that allows efficient manipulation of spintronic devices, with interest expanding to various processes beyond electric field manipulation. In the past decade, research has focused on exploring materials for larger SOT efficiency. Recent developments have extended material research to include processes involving phonons, magnons, and heat.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Chemistry, Multidisciplinary
Yang Wu, Mehrdad Elyasi, Xuepeng Qiu, Mengji Chen, Yang Liu, Lin Ke, Hyunsoo Yang
ADVANCED MATERIALS
(2017)
Article
Physics, Applied
Rajagopalan Ramaswamy, Xuepeng Qiu, Tanmay Dutta, Shawn David Pollard, Hyunsoo Yang
APPLIED PHYSICS LETTERS
(2016)
Article
Physics, Applied
Jean Besbas, Li Ming Loong, Yang Wu, Hyunsoo Yang
APPLIED PHYSICS LETTERS
(2016)
Article
Materials Science, Multidisciplinary
Longqing Cong, Prakash Pitchappa, Yang Wu, Lin Ke, Chengkuo Lee, Navab Singh, Hyunsoo Yang, Ranjan Singh
ADVANCED OPTICAL MATERIALS
(2017)
Article
Nanoscience & Nanotechnology
Yang Wu, Xuepeng Qiu, Hongwei Liu, Jingbo Liu, Yuanfu Chen, Lin Ke, Hyunsoo Yang
Article
Physics, Multidisciplinary
Rahul Mishra, Jiawei Yu, Xuepeng Qiu, M. Motapothula, T. Venkatesan, Hyunsoo Yang
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
Yi Wang, Dapeng Zhu, Yang Wu, Yumeng Yang, Jiawei Yu, Rajagopalan Ramaswamy, Rahul Mishra, Shuyuan Shi, Mehrdad Elyasi, Kie-Leong Teo, Yihong Wu, Hyunsoo Yang
NATURE COMMUNICATIONS
(2017)
Article
Multidisciplinary Sciences
Shawn D. Pollard, Joseph A. Garlow, Jiawei Yu, Zhen Wang, Yimei Zhu, Hyunsoo Yang
NATURE COMMUNICATIONS
(2017)
Article
Nanoscience & Nanotechnology
Vanessa Li Zhang, Chen Guang Hou, Kai Di, Hock Siah Lim, Ser Choon Ng, Shawn David Pollard, Hyunsoo Yang, Meng Hau Kuok
Article
Physics, Applied
Rajagopalan Ramaswamy, Yi Wang, Mehrdad Elyasi, M. Motapothula, T. Venkatesan, Xuepeng Qiu, Hyunsoo Yang
PHYSICAL REVIEW APPLIED
(2017)
Article
Multidisciplinary Sciences
Cong Son Ho, Yi Wang, Zhou Bin Siu, Seng Ghee Tan, Mansoor B. A. Jalil, Hyunsoo Yang
SCIENTIFIC REPORTS
(2017)
Article
Multidisciplinary Sciences
Ankshita Prasad, Daniel B. Loong Teh, Agata Blasiak, Chou Chai, Yang Wu, Payam M. Gharibani, In Hong Yang, Thang T. Phan, Kah Leong Lim, Hyunsoo Yang, Xiaogang Liu, Angelo H. All
SCIENTIFIC REPORTS
(2017)
Article
Multidisciplinary Sciences
X. B. Wang, L. Cheng, Y. Wu, D. P. Zhu, L. Wang, Jian-Xin Zhu, Hyunsoo Yang, Elbert E. M. Chia
SCIENTIFIC REPORTS
(2017)
Article
Physics, Applied
Tanmay Dutta, Sachin Pathak, Mohamed Asbahi, Kubra Celik, Jong Min Lee, Ping Yang, M. S. M. Saifullah, Ahmet Oral, C. S. Bhatia, Jongin Cha, Jongill Hong, Hyunsoo Yang
APPLIED PHYSICS LETTERS
(2017)
Article
Materials Science, Multidisciplinary
Kulothungasagaran Narayanapillai, Gyungchoon Go, Rajagopalan Ramaswamy, Kalon Gopinadhan, Dongwook Go, Hyun-Woo Lee, Thirumalai Venkatesan, Kyung-Jin Lee, Hyunsoo Yang
