A5103252014- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Advanced Memory and Neural Computing
- ZnO doping and properties
- EEG and Brain-Computer Interfaces
- Magneto-Optical Properties and Applications
- Blind Source Separation Techniques
- Analytical chemistry methods development
- Advanced Condensed Matter Physics
- Ferroelectric and Negative Capacitance Devices
- Analytical Chemistry and Chromatography
- Neural Networks and Applications
- Magnetic Properties and Synthesis of Ferrites
- Semiconductor materials and devices
- Magnetic Properties and Applications
- Pleural and Pulmonary Diseases
- Photonic and Optical Devices
- Synthesis and properties of polymers
- Advanced Chemical Sensor Technologies
- Functional Brain Connectivity Studies
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Multiferroics and related materials
- Magnetic confinement fusion research
- Silicone and Siloxane Chemistry
- Lung Cancer Diagnosis and Treatment
Nanjing University
2022-2025
Xi'an University of Science and Technology
2022-2024
Shanghai Advanced Research Institute
2022
Chinese Academy of Sciences
2022
Southeast University
2019-2022
University of York
2022
University of Jinan
2022
Shanxi Medical University
2019-2021
First Affiliated Hospital of Guangzhou Medical University
2021
Beihang University
2021
Some classification studies of brain–computer interface (BCI) based on speech imagery show potential for improving communication skills in patients with amyotrophic lateral sclerosis (ALS). However, current research is limited scope and primarily focuses vowels or a few selected words. In this paper, we propose complete scheme multi-character EEG signals derived from imagery. Firstly, record 31 contents, including 26 alphabets 5 commonly used punctuation marks, seven subjects using...
Abstract Altermagnetism, a newly identified class of magnetism blending characteristics both ferromagnetism and antiferromagnetism, is emerging as compelling frontier in spintronics. This study reports groundbreaking discovery robust, 100% field‐free spin‐orbit torque (SOT) switching RuO 2 (101)/[Co/Pt] /Ta structure. The experimental results reveal that the spin currents, induced by in‐plane charge current, flow along [100] axis, with polarization direction aligned parallel to Néel vector....
Abstract Field‐free magnetization switching with low critical current density is a fundamental pursuit for spin‐orbit torque (SOT) devices. Here, novel strategy provided that utilizes the sperimagnetism of NiFeTb to achieve current‐induced field‐free high efficiency and controllable chirality. The required as 2.8 × 10 6 A cm −2 , an order magnitude lower than in conventional heavy metal‐based magnetic heterostructures. ultralow attributed exceptional soft magnetism, nucleation‐dominant...
Spin–orbit torque (SOT)-induced magnetization switching in ferrimagnetic materials is promising for application a new generation of information storage devices. Here, we demonstrate SOT-induced field-free the perpendicularly magnetized CoTb ferrimagnet layer IrMn/CoTb bilayer, which in-plane magnetic inversion symmetry broken by spontaneous exchange bias (IEB) established isothermal crystallization IrMn layer. We obtain significant SOT effective field acting on and large spin Hall angle this...
Abstract Current induced spin–orbit torque (SOT) manipulation of magnetization is pivotal in spintronic devices. However, its application for perpendicular magnetic anisotropy magnets, crucial high‐density storage and memory devices, remains nondeterministic inefficient. Here, a highly efficient approach demonstrated to generate collinear spin currents by artificial modulation interfacial symmetry, achieving 100% current‐induced field‐free SOT switching CoFeB multilayers with on stepped Al 2...
Spin–orbit torque (SOT) is recognized as an effective way to manipulate magnetization in spintronic devices. For the low-power consumption and high-endurance requirements of future computer architectures, reducing critical SOT switching current density improving efficiency are crucial, especially perpendicularly magnetized structures. Here, we have conducted a comprehensive study on Ta/CoFeB structure with perpendicular magnetic anisotropy by inserting oxide insulating layer Fe2O3 bottom...
We obtained epitaxial single-crystal Fe3O4(001)/MgO(001) thin films by magnetron sputtering. The high quality of the grown Fe3O4 was confirmed reflection high-energy electron diffraction and x-ray photoelectron spectroscopy. Atomic magnetic properties were investigated using vibrating sample magnetometry circular dichroism. values saturation magnetization moment are 407 ± 5 emu/cm3 (3.26 0.04 μB/(f.u.)) 3.31 0.15 μB/(f.u.), respectively, in film as nm, which close to bulk values. spin...
Delving into the advancing realm of low-power, high-density magnetic memory, this research presents a Ta/(Pt/Ta)${}_{4}$/Pt/Co/Ta multilayered structure. Confronting challenges in conventional spin-orbit torque (SOT) random-access memory (MRAM), such as low spin Hall angles and elevated current densities, authors achieve reduction 79% critical-switching-current density, while enhancing efficiency minimizing coercivity. Notably, strong linear correlation among key parameters validates...
Due to its high sensitivity and because it does not rely on the magneto-optical response, terahertz (THz) emission spectroscopy has been used as a powerful time-resolved tool for investigating ultrafast demagnetization spin current dynamics in nanometer-thick ferromagnetic (FM)/heavy metal (HM) heterostructures. Here, by changing order of conductive HM coating FM nanometer film, dominant electric dipole contribution laser-induced THz radiation can be unraveled from magnetic dipole....
Abstract Two proposed syringe membrane filter solid phase microextraction and liquid/solid microextraction, coupled separately with high performance liquid chromatography, were developed for simultaneous enrichment determination of the trace level flavonoids in traditional Chinese medicine. In was served as a adsorption film to adsorb target analytes. And used not only an phase, but also holder extraction solvent realize liquid‐solid synergistic extraction. The simple operation, rapid...
The dynamic control of magnetization by short laser pulses has recently attracted interest. transient at the metallic magnetic interface been investigated through second-harmonic generation and time-resolved magneto-optical effect. However, ultrafast light-driven nonlinearity in ferromagnetic heterostructures for terahertz (THz) radiation remains unclear. Here, we present THz from a heterostructure, Pt/CoFeB/Ta, which is ascribed to an ∼6–8% contribution magnetization-induced optical...
The transport of biomolecules across bio-membranes occurs in a complex environment where the fluid on both sides membrane contains many inclusions. Monte Carlo method and hard-sphere (HS) model are used to simulate translocation linear polymer ring through nanopore crowded environment. We compare results find that is more sensitive surrounding Moreover, influences inclusions studied our show changes time change tendency random side membrane. Here, radius gyration described as balance.
We investigate the magnetic and electronic properties of Co films on Fe3O4(001) achieved through epitaxial growth using magnetron sputtering. X-ray circularly dichroism measurements characterize atomic magnetism. Compared to MgO substrate, Fe3O4 exhibits a 96% enhancement in orbital moment (from 0.25 0.49 µB/atom) an increase spin 1.37 1.53 µB/atom), resulting increased mratio(ml/ms) from 0.18 0.32. This emerges as consequence interface interaction between Fe3O4. Density functional theory...
Realizing deterministic current-induced spin-orbit torque (SOT) magnetization switching, especially in systems exhibiting perpendicular magnetic anisotropy (PMA), typically requires the application of a collinear in-plane field, posing challenging problem. In this study, we successfully achieve field-free SOT switching CoFeB/MgO system. Ta/CoFeB/MgO/NiO/Ta structure, spin reflection at NiO interface, characterized by noncollinear structures with canted magnetization, generates current an...
Researchers have recently identified a novel class of magnetism, termed "altermagnetism", which exhibits characteristics both ferromagnetism and antiferromagnetism. Here, we report groundbreaking discovery efficient field-free spin-orbit torque (SOT) switching in RuO$_2$ (101)/Co/Pt/Co/Pt/Ta structure. Our results demonstrate that the spin current flows along [100] axis, induced by in-plane charge current, with polarization direction aligned parallel to N\'eel vector. These z-polarized spins...
Abstract Understanding the dynamic properties of magnetic films with thickness down to nanometer scale is both fundamental interests, as well great importance for development spintronic devices. In this study, we report emergence anisotropic magnetization dynamics by exploring a quasi-two-dimensional single-crystalline Fe/GaAs(001) interface varying Fe layer thicknesses ranging from 0.7 3.0 nm using ferromagnetic resonance (FMR) technique. Various linewidth contributions, including intrinsic...
Abstract In this study, deterministic current‐induced spin‐orbit torque (SOT) magnetization switching is achieved, particularly in systems with perpendicular magnetic anisotropy (PMA), without the need for a collinear in‐plane field, traditionally challenging requirement. Ta/CoFeB/MgO/NiO/Ta structure, spin reflection at MgO/NiO interface generates current an out‐of‐plane polarization component σ z . Notably, sample featuring 0.8 nm MgO and 2 NiO demonstrates impressive optimal ratio...
Abstract Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is becoming indispensable both at fundamental level to develop future spin‐based electronics. Recently it has been shown femtosecond pulsed‐laser excitation of magnetic thin films produces intense spin‐polarized hot electrons, thus attracting a lot attention. While electrons are known play pivotal role in laser‐induced demagnetization, their effect on magnetization switching remains an open issue. This...
Chinese herbal compound preparations are commonly composed of multiple traditional medicines (TCMs). The components preparation complex, therefore, in this paper, ballpoint connector supported solvent microextraction (BC-SME) coupled with high-performance liquid chromatography ultraviolet detection (HPLC/UV) is reported for the simultaneous extraction, enrichment and determination active flavonoids anthraquinones minimal waste production. primary parameters affecting performance were...
Turbulent self-organization driven by global ideal interchange modes in a dipole-confined plasma is explored with self-consistent, whole-plasma simulations using flux-tube averaged magnetohydrodynamic model dipole magnetic geometry. We show the existence of robust particle pinch interchange-mode fluctuations, which particles are transported up density gradient. It found that profiles field spontaneously relax to marginally stable state as centrally peaked pressure and created transport.
The absence of ordered information ("disordered" information) in the environment has various negative influences on individuals: "The world is random" model postulates that disordered through a process "perceiving disorder leads to threatening feelings". In experiment 1, attentional bias disorderly pictures was measured by dotprobe tasks. results revealed individuals more attention physical environmental and this occurs at strategic processing stage. 2, participants under...