A5101616788- Magnetic properties of thin films
- Advanced Memory and Neural Computing
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Physics of Superconductivity and Magnetism
- Ferroelectric and Negative Capacitance Devices
- Ferroelectric and Piezoelectric Materials
- Quantum and electron transport phenomena
- Advanced Condensed Matter Physics
- Metamaterials and Metasurfaces Applications
- Magnetic Properties and Applications
- Magnetic Field Sensors Techniques
- Theoretical and Computational Physics
- ZnO doping and properties
- Metallic Glasses and Amorphous Alloys
- Electronic and Structural Properties of Oxides
- Electromagnetic Simulation and Numerical Methods
- Chromosomal and Genetic Variations
- Material Science and Thermodynamics
- Genetics and Plant Breeding
- Copper Interconnects and Reliability
- Heusler alloys: electronic and magnetic properties
- Chemotherapy-related skin toxicity
- Acoustic Wave Resonator Technologies
- Non-Destructive Testing Techniques
Biotechnology Research Institute
2023-2025
Chinese University of Hong Kong, Shenzhen
2020-2024
Chinese Academy of Agricultural Sciences
2023
University of Science and Technology of China
2021-2022
Guangdong University of Technology
2022
University of Hong Kong
2022
King Abdullah University of Science and Technology
2017-2022
Chinese University of Hong Kong
2022
Northeast Agricultural University
2022
Hefei National Center for Physical Sciences at Nanoscale
2021
Electrically switchable magnetization is considered a milestone in the development of ultralow power spintronic devices, and it has been long sought-after goal for electric-field control magnetoresistance magnetic tunnel junctions with consumption. Here, through integrating spintronics multiferroics, we investigate MgO-based on ferroelectric substrate high ratio 235%. A giant, reversible nonvolatile manipulation to about 55% realized at room temperature without assistance field. Through...
Magnetic skyrmions are topologically protected nanoscale spin textures exhibiting fascinating physical behaviors. Recent observations of room temperature in sputtered multilayer films an important step towards their use ultra-low power devices. Such practical applications prefer to be stable at zero magnetic fields and temperature. Here, we report the creation skyrmion lattices Pt/Co/Ta multilayers by a scanning local field using force microscopy tips. We also show that those newly created...
Abstract Skyrmions and skyrmioniums are topologically non-trivial spin textures found in chiral magnetic systems. Understanding the dynamics of these particle-like excitations is crucial for leveraging their diverse functionalities spintronic devices. This study investigates evolution [Pt/Co] 3 /Ru/[Co/Pt] multilayers with ferromagnetic interlayer exchange coupling. By precisely controlling excitation relaxation processes through combined field electric current manipulation, reversible...
Maize, now ranking #1 in world cereal production (accounting for ~42% of total worldwide), plays a pivotal role securing food and feed supply globally (FAO, 2023). Historically, increasing planting density has been adopted as key measurement to maize grain yield per unit land area (Mansfield Mumm, 2014). Plant height (PH) ear (EH) are agronomic traits that determine lodging resistance thus high-density tolerance (Wang et al., 2020). Recently, it proposed "Short corn" may represent future...
Magnetic skyrmions and skyrmionium (a pair of with a net topological charge zero) in ferromagnetic systems continue to be studied intensively, due their potential for application spintronic devices. However, the physics possible applications...
Abstract Magnetic skyrmions are promising information carriers for dense and energy‐efficient storage owing to their small size, low driving‐current density, topological stability. Electrical detection of is a crucial requirement drive skyrmion devices toward applications. The use magnetic tunnel junction (MTJ) commonly suggested this purpose as MTJs key spintronic large‐scale commercialization that can convert textures into electrical signals. To date, however, it has been challenging...
We investigated current driven spin-orbit torques in $\mathrm{C}{\mathrm{u}}_{40}\mathrm{A}{\mathrm{u}}_{60}/\mathrm{N}{\mathrm{i}}_{80}\mathrm{F}{\mathrm{e}}_{20}/\mathrm{Ti}$ layered structures with in-plane magnetization. have demonstrated a reliable and convenient method to separate dampinglike torque fieldlike by using the second harmonic technique. It is found that depend on temperature very differently. Dampinglike increases temperature, while decreases which are different from...
One of the motivations for multiferroics research is to find an energy-efficient solution spintronic applications, such as solely electrical control magnetic tunnel junctions. Here, we integrate spintronics and by depositing MgO-based junctions on ferroelectric substrate. We fabricate two pairs electrodes substrate generate localized strain applying voltage. This voltage-generated has ability modify anisotropy free layer effectively. By sequentially voltages these electrodes, successively...
Magnetic skyrmions are particle-like topological spin configurations, which can carry binary information and thus promising building blocks for future spintronic devices. In this work, we investigate the relationship between skyrmion dynamics characteristics of injected current in a skyrmion-based torque nano-oscillator, where excitation source is introduced from point nano-contact at center nanodisk. It found that will move away nanodisk if it driven by spin-polarized current; however,...
Cooper pairs in superconductors are normally spin singlet. Nevertheless, recent studies suggest that spin-triplet can be created at carefully engineered superconductor-ferromagnet interfaces. If spin-polarized they would transport not only charge but also a net component, without dissipation, and therefore minimize the heating effects associated with spintronic devices. Although it is now established triplet supercurrents exist, their most interesting property - inferred indirectly from...
Maize (Zea mays L.) is a major staple crop worldwide, and during modern maize breeding, cultivars with increased tolerance to high-density planting higher yield per plant have contributed significantly the unit land area. Systematically identifying key agronomic traits their associated genomic changes breeding remains significant challenge because of complexity genetic regulation interactions various traits, most them being controlled by numerous small-effect quantitative trait loci (QTLs)....
Strain-mediated ferromagnetic/ferroelectric (FE) heterostructures have played an important role in multiferroic materials to investigate the electric-field control of magnetism past decade, due their excellent performances, such as room-temperature operation and large magnetoelectric (ME) coupling effect. Because different FE-switching-originated strain behaviors varied interfacial effect, both loop-like (nonvolatile) butterfly-like (volatile) converse ME effects been reported. Here, we a...
Magnetic skyrmions are topologically protected particlelike spin textures initially discovered in chiral magnetic materials. When driven by an electric current, move at a certain angle (i.e., skyrmion Hall angle) with respect to the driving current due Magnus force, giving rise so-called effect (SHE). The SHE often leads annihilation sample edge, which is detrimental for practical applications. In this work, we study, experimentally and through micromagnetic simulations, current-driven...
Magnetic skyrmions are promising for future spintronic devices due to their nanoscale size, high thermal stability, and mobility at low current densities. However, practical applications may be limited by the skyrmion Hall effect (SkHE), which causes deflect from direction of driving current. The SkHE usually results in annihilation destructive skyrmion–boundary interactions. In this review, we provide a comprehensive overview fundamentals as well recent advances manipulation suppression...
Ferromagnetic resonance with applied electric fields has been used to investigate the magnetoelectric effect in a Fe/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 heterostructure. The out-of-plane follows butterfly behavior response field, consistent linear piezoelectric strain-mediated mechanism. In contrast, in-plane exhibits loop-like dependence on field. addition, relaxation of resonant field observed after ferroelectric domains are switched. feature and time-dependent suggest that coupling involves 109°...
Abstract Synthetic antiferromagnetic (SAF) skyrmions are emerging as novel information carriers due to their high mobility and lack of a skyrmion Hall effect. However, distinguishing SAF from ferromagnetic counterparts using imaging techniques like magneto‐optical microscopy remains challenging. While the suppressed intrinsic effect (SkHE) has been commonly used identify skyrmions, it is important note that other factors such defect pinning dipolar interaction can also lead SkHE. Therefore,...
Abstract Emerging nonvolatile multilevel memory devices have been regarded as a promising solution to meet the increasing demand of high‐density with low‐power consumption. In particular, decimal system new computers instead binary could be developed if ten states are realized. Here, general remanent magnetism engineering method is proposed for realizing multiple reliable magnetic and resistance states, not depending on specific material or device structure. Especially, proof‐of‐concept...
Magnetic skyrmions are appealing for applications in emerging topological spintronic devices. However, when magnetic a nanowire driven by an in-plane current, transverse Magnus force deflects their trajectories from the current direction, which tends to push skyrmion toward edge. If density is exceedingly large, will be annihilated around edge, leading greatly reduced propagation distance and maximum speed of skyrmion, detrimental skyrmion-based applications. Here, we prepare multilayer...
Surface roughness plays an important role on the magnetotransport properties of thin films, especially in ultrathin films. In this work, we prepared Fe films with various surface by using different seed layers and studied electrical transport anomalous Hall effect. By tuning scattering, longitudinal resistivity (${\ensuremath{\rho}}_{xx}$) measured at 5 K increases one order magnitude corresponding (${\ensuremath{\rho}}_{\mathrm{AHE}}$) three times increasing roughness. The intrinsic,...
We study the magnetic domain pattern in a ferrimagnetic CoTb thin film using Lorentz transmission electron microscopy. The evolution of patterns is captured at different temperatures and external fields. Magnetic dipole skyrmions bubbles can be created simultaneously by increasing temperature sample applying appropriate out-of-plane By tuning fields, it found that are annihilated higher field compared to bubbles. Moreover, we also find in-plane influences formation shape Further,...
Magneto-optic Kerr effect (MOKE) microscopy is a widely used technique for observation and characterization of microscopic magnetic structures. While being efficient easy-to-use, current commercial MOKE microscopes are not superb in time resolution, limited by the frame rate camera. Here, we introduce revolutionary sensor, namely, event camera, as convenient add-on to traditional explore potential applications event-based vision research areas using microscopy. We use stacking method improve...
Skyrmions, swirling spin textures with topologically protected stability and low critical driven-current density, can be generated from the stripe domain current pulses, bringing them closer to practical applications in racetrack memory. However, mechanism of this topological transition skyrmion remains unclear because process occurs at a nanosecond timescale, giving rise difficulties observing using imaging tools. In study, we controlled wall - by combining Joule heating spin-orbit torque...
The effect of interfacial scattering on anomalous Hall (AHE) was studied in the multilayers. Field-dependent resistivity measured temperature range 5–300 K with magnetic field up to 50 kOe. () enhanced by more than six times at 5 from n = 1 12 due increased scattering, whereas longitudinal nearly three times. A scaling relation obtained for and K, indicating that dominant mechanism(s) AHE these multilayers should be side-jump or/and intrinsic nature. new (Tian et al 2009 Phys. Rev. Lett. 103...
Understanding how information encoded in spins is transported antiferromagnets important for the development of spintronics. In metallic antiferromagnets, spin carried by both electrons and magnons, discriminating between these two contributions remains a challenge. Combining experiment theory, authors are able to separate magnonic electronic contributions. Remarkably, magnons far more efficient than conveying information, even disordered antiferromagnets. This result suggests that...