Article
Multidisciplinary Sciences
Chun-Pu Wang, Shih-Hung Cheng, Wen-Jeng Hsueh
Summary: In this paper, the advantages of using two-dimensional materials for spintronic device designs are investigated. A spin valve based on graphene nanoribbons is proposed to generate a large spin current density at room temperature, which can reach the critical value with the help of a tunable gate voltage. This proposed spin valve overcomes the difficulties faced by traditional magnetic tunnel junction-based magnetic random-access memories and meets the criteria for the reading mode, opening up possibilities for spin logic devices based on 2D materials.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Jindi Feng, Kunpeng Li, Mingkun Zheng, Xiaojuan Yuan, Yong Liu, Zhihong Lu, Rui Xiong
Summary: This study investigates the dynamical behaviors of an all-permalloy structured spin-torque nano-oscillator (STNO) and finds that it can exhibit two stable precession modes of magnetization under varying applied DC current densities. The switching between the modes can be achieved through pulsed magnetic field, and the output power can be significantly enhanced by building an array of STNOs.
Article
Multidisciplinary Sciences
Binoy K. Hazra, Banabir Pal, Jae-Chun Jeon, Robin R. Neumann, Boerge Goebel, Bharat Grover, Hakan Deniz, Andriy Styervoyedov, Holger Meyerheim, Ingrid Mertig, See-Hun Yang, Stuart S. P. Parkin
Summary: The generation of a robust spin current with both in-plane and out-of-plane spin polarization is demonstrated in epitaxial thin films of the chiral antiferromagnet Mn3Sn in proximity to permalloy thin layers. The in-plane polarized spin current is generated from the interior of Mn3Sn and follows its temperature dependence, while the out-of-plane polarized spin current arises from the spin swapping effect at the Mn3Sn/permalloy interface.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jiaxin Du, Mei Li, Jie Lu
Summary: By investigating the effects of IDMI on 180DWs in LNSVs, it has been found that IDMI can stabilize the originally unstable traveling mode and increase the Walker limit. The impact of IDMI on the velocity of 180DWs varies depending on the type of polarizer, with perpendicular polarizers resulting in the absence of precessional flow.
Article
Materials Science, Multidisciplinary
Anam Hanif, Arbab Abdur Rahim, Husnul Maab
Summary: The skyrmion-based spin torque nano-oscillators (STNOs) have attracted attention as potential microwave signal generators. However, the Magnus force effect causes skyrmions to accumulate or annihilate in the device. To counterbalance this effect, a hybrid polarizer system is proposed in a circular nanopillar-shaped spin valve, which enables steady circular motion of the skyrmion without annihilation or accumulation. The proposed system achieves a skyrmion oscillation frequency of up to 3.35 GHz, higher than that of a homogeneous polarizer-based STNO.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
Doo Hyung Kang, Ji-Hun Byun, Mincheol Shin
Summary: In this study, the critical switching current density of a perpendicular magnetic tunnel junction was calculated using the linearized Landau-Lifshitz-Gilbert (LLG) equation, demonstrating a nonlinear relationship between the current density inducing spin-orbit torque and spin-transfer torque. The impact of the spin-orbit field-like torque on the critical switching current density was investigated, revealing proportional dependence with damping constant and root alpha when H-eff >> H-SOT..beta and its influence on the critical switching current density were also discussed, showing linear and nonlinear decreases with increasing beta and j(SOT) respectively.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
D. R. Rodrigues, A. Salimath, K. Everschor-Sitte, K. M. D. Hals
Summary: This study successfully manipulates domain walls in kagome antiferromagnets via a spin-wave source, with the speed and direction of the domain wall motion regulated by tuning the spin wave frequency. By establishing an effective action and deriving equations for spin-wave-driven domain wall motion, the frequency-dependent velocity of the spin texture is explained.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Wang Ri-Xing, Zeng Yi-Han, Zhao Jing-Li, Li Lian, Xiao Yun-Chang
Summary: The data writing scheme of magnetization reversal driven by spin-transfer torque has become a mainstream way of implementing information writing in magnetic random access memory, overcoming the shortcomings of traditional magnetic-field writing mechanism. However, magnetic random access memories based on this method face issues such as barrier reliability and limited storage speed. Recent experimental studies have shown that the spin-orbit torque through the spin Hall effect or Rashba effect in heavy-metal/ferromagnetic bilayer structures have the potential advantages in overcoming these limitations and achieving rapid reversal.
ACTA PHYSICA SINICA
(2023)
Article
Physics, Multidisciplinary
Zheng-Chuan Wang
Summary: Research shows that there are two types of spin transfer torque in spintronics, namely electric spin transfer torque and thermal spin torque, which can be described by a unified torque. The torques in a magnetoelectric device mainly come from spin-polarized current and thermal spin current, further divided into local equilibrium and nonequilibrium types. Additionally, a new term appears in the expression, related to the inhomogeneity of magnetization, quantitatively manifested in an example of electric and thermal transport through a constrained ferromagnet.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Jiaxin Du, Mei Li, Xue Zhang, Bin Xi, Yong-Jun Liu, Chun-Gui Duan, Jie Lu
Summary: This study investigates the steady-flow dynamics of ferromagnetic 180-degree domain walls in long and narrow spin valves with interfacial Dzyaloshinskii-Moriya interaction. The results show that the dynamics of the domain walls can be manipulated by controlling the magnetization orientation of the polarizers, providing possibilities for magnetic nanodevices with rich functionality and high robustness.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Applied
Zhengping Yuan, Jingwei Long, Zhengde Xu, Yue Xin, Lihua An, Jie Ren, Xue Zhang, Yumeng Yang, Zhifeng Zhu
Summary: The dynamics of a spin torque-driven ferrimagnetic (FiM) system is investigated, demonstrating ultrafast switching in the picosecond range. Excessive current leads to magnetic oscillation, preventing unlimited increase in switching speed. The impact of thermal fluctuations is studied, distinguishing FiM dynamics into different regions. A significant deviation between FiM and ferromagnet (FM) is observed, with FM being insensitive to thermal fluctuations while the thermal effect is pronounced in FiM.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Van Tuong Pham, Haozhe Yang, Won Young Choi, Alain Marty, Inge Groen, Andrey Chuvilin, F. Sebastian Bergeret, Luis E. Hueso, Ilya V. Tokatly, Felix Casanova
Summary: Spin-charge interconversion plays a crucial role in systems, and we experimentally demonstrate that the inverse spin galvanic effect at metal interfaces has a significant impact on spin-charge interconversion, rather than the spin Hall effect in bulk metals. Using two parameters to quantify spin-charge interconversion is an effective approach.
Article
Physics, Multidisciplinary
Cong Xiao, Weikang Wu, Hui Wang, Yue-Xin Huang, Xiaolong Feng, Huiying Liu, Guang-Yu Guo, Qian Niu, Shengyuan A. Yang
Summary: We propose a method for generating spin in second order of electric fields that is time-reversal-even and dominates spin polarization in a wide range of nonmagnetic materials with centrosymmetry. This method also leads to a novel nonlinear spin-orbit torque in magnets. We demonstrate the quantum origin of this effect from the momentum space dipole of the anomalous spin polarizability. First-principles calculations predict sizable spin generation in several nonmagnetic hcp metals, monolayer TiTe2, and ferromagnetic monolayer MnSe2, which can be experimentally detected. Our work opens up new possibilities for nonlinear spintronics in both nonmagnetic and magnetic systems.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Abhijeet Ranjan, Chun-Liang Yang, Chia-Chang Lee, Rudis Ismael Salinas Padilla, Chih-Huang Lai
Summary: Writing using spin-orbit torque (SOT) has been widely studied in the field of magnetic random-access memory (MRAM). This study introduces rhenium (Re) as a new material for achieving thermally stable perpendicular magnetic anisotropy (PMA) and spin-orbit torque (SOT) switching, providing a new avenue for the material design of SOT-based MRAM.
Article
Materials Science, Multidisciplinary
D. Aravinthan, P. Sabareesan, K. Manikandan, J. B. Sudharsan
Summary: This study numerically investigates the effect of oscillatory interlayer exchange coupling (OXC) on current-induced magnetization switching in four different pentalayer nanopillar alloys. The study finds that the critical current density and switching time can be reduced by controlling the OXC field and choosing a magnetic material with low saturation magnetization.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
J. Shan, F. K. Dejene, J. C. Leutenantsmeyer, J. Flipse, M. Munzenberg, B. J. van Wees
Article
Materials Science, Multidisciplinary
F. K. Dejene, N. Vlietstra, D. Luc, X. Waintal, J. Ben Youssef, B. J. van Wees
Article
Multidisciplinary Sciences
I. J. Vera-Marun, J. J. van den Berg, F. K. Dejene, B. J. van Wees
NATURE COMMUNICATIONS
(2016)
Article
Chemistry, Multidisciplinary
K. Gaurav Rana, Fasil K. Dejene, Neeraj Kumar, Catherine R. Rajamathi, Kornelia Sklarek, Claudia Felser, Stuart S. P. Parkin
Article
Materials Science, Multidisciplinary
F. K. Dejene, J. Flipse, B. J. van Wees
Article
Physics, Multidisciplinary
J. Flipse, F. K. Dejene, D. Wagenaar, G. E. W. Bauer, J. Ben Youssef, B. J. van Wees
PHYSICAL REVIEW LETTERS
(2014)
Article
Multidisciplinary Sciences
Robin Blaesing, Tianping Ma, See-Hun Yang, Chirag Garg, Fasil Kidane Dejene, Alpha T. N'Diaye, Gong Chen, Kai Liu, Stuart S. P. Parkin
NATURE COMMUNICATIONS
(2018)
Article
Physics, Applied
K. S. Das, F. K. Dejene, B. J. van Wees, I. J. Vera-Marun
APPLIED PHYSICS LETTERS
(2019)
Article
Materials Science, Multidisciplinary
James M. Taylor, Edouard Lesne, Anastasios Markou, Fasil Kidane Dejene, Benedikt Ernst, Adel Kalache, Kumari Gaurav Rana, Neeraj Kumar, Peter Werner, Claudia Felser, Stuart S. P. Parkin
PHYSICAL REVIEW MATERIALS
(2019)
Article
Physics, Applied
James M. Taylor, Edouard Lesne, Anastasios Markou, Fasil Kidane Dejene, Pranava Keerthi Sivakumar, Simon Poellath, Kumari Gaurav Rana, Neeraj Kumar, Chen Luo, Hanjo Ryll, Florin Radu, Florian Kronast, Peter Werner, Christian H. Back, Claudia Felser, Stuart S. P. Parkin
APPLIED PHYSICS LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Shuo-Ying Yang, Jonathan Noky, Jacob Gayles, Fasil Kidane Dejene, Yan Sun, Mathias Dorr, Yurii Skourski, Claudia Felser, Mazhar Nawaz Ali, Enke Liu, Stuart S. P. Parkin
Article
Materials Science, Multidisciplinary
Vincent Castel, Rodolphe Jeunehomme, Jamal Ben Youssef, Nicolas Vukadinovic, Alexandre Manchec, Fasil Kidane Dejene, Gerrit E. W. Bauer
Article
Materials Science, Multidisciplinary
K. S. Das, F. K. Dejene, B. J. van Wees, I. J. Vera-Marun
Article
Materials Science, Multidisciplinary
N. Vlietstra, B. J. van Wees, F. K. Dejene