A5101996317- Magnetic properties of thin films
- Magneto-Optical Properties and Applications
- Advanced Photocatalysis Techniques
- Physics of Superconductivity and Magnetism
- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Topological Materials and Phenomena
- Magnetic Properties and Applications
- Theoretical and Computational Physics
- Minerals Flotation and Separation Techniques
- Copper-based nanomaterials and applications
- Iron oxide chemistry and applications
- Covalent Organic Framework Applications
- Ferroelectric and Negative Capacitance Devices
- Laser-Matter Interactions and Applications
- Quantum and electron transport phenomena
- Terahertz technology and applications
- Advanced Condensed Matter Physics
- Enzyme Catalysis and Immobilization
- Electrocatalysts for Energy Conversion
- Force Microscopy Techniques and Applications
- Advanced Memory and Neural Computing
- ZnO doping and properties
- Advanced Fiber Laser Technologies
- Ionic liquids properties and applications
Tsinghua University
2023-2025
University of California, Los Angeles
2022-2025
State Ethnic Affairs Commission
2023-2024
North Minzu University
2023-2024
Shenzhen University
2024
Anhui University of Technology
2023-2024
Beijing Academy of Quantum Information Sciences
2023
The Ohio State University
2014-2023
University of Shanghai for Science and Technology
2019
Nanjing University
2009
We demonstrate nondecaying, steplike electrical switching of tristate Néel order in Pt/α-Fe_{2}O_{3} bilayers detected by the spin-Hall induced anomalous Hall effect. The as-grown exhibit sawtooth behavior generated current pulses. After annealing a high pulse current, signals reveal single-pulse saturated, switching. Together with control experiments, we show that is due to an artifact Pt while actual spin-orbit torque antiferromagnetic steplike. Our Monte Carlo simulations explain...
Abstract Low-damping magnetic materials have been widely used in microwave and spintronic applications because of their low energy loss high sensitivity. While the Gilbert damping constant can reach 10 −4 to −5 some insulating ferromagnets, metallic ferromagnets generally larger due magnon scattering by conduction electrons. Meanwhile, low-damping are desired for charge-based devices. Here, we report growth Co 25 Fe 75 epitaxial films with excellent crystalline quality evident clear Laue...
The Dzyaloshinskii-Moriya interaction (DMI) is an antisymmetric exchange that stabilizes spin chirality. One scientific and technological challenge understanding controlling the between chirality electric field. In this study, we investigate unconventional field effect on interfacial DMI, skyrmion helicity, dynamics in a system with broken inversion symmetry. We design heterostructures 3d-5d atomic orbital interface to demonstrate gate bias control of DMI energy thus transform opposite...
Abstract Achieving spin-pinning at the interface of hetero-bilayer ferromagnet/antiferromagnet structures in conventional exchange bias systems can be challenging due to difficulties control and weakening caused by poor quality. In this work, we propose an alternative approach stabilize interaction uncompensated antiferromagnet utilizing a gradient interlayer coupling. We demonstrate through designed field training protocol odd-layer topological MnBi 2 Te 4 . Our results reveal remarkable...
Abstract Stacking superconductors (SC) with ferromagnetic materials (FM) significantly impact superconductivity, enabling the emergence of spin‐triplet states and topological superconductivity. The tuning superconductivity in SC‐FM heterostructure is also reflected recently discovered superconducting diode effect, characterized by nonreciprocal electric transport when time inversion symmetries are broken. Notably, systems, a reversal operation reverses both current magnetization, leading to...
To date, magnetic proximity effect (MPE) has only been conclusively observed in ferromagnet (FM) based systems. We report the observation of anomalous Hall and anisotropic magnetoresistance angular dependent (ADMR) measurements Pt on antiferromagnetic (AF) $\alpha$-Fe$_2$O$_3$(0001) epitaxial films at 10 K, which provide evidence for MPE. The N\'eel order $\alpha$-Fe$_2$O$_3$ induced magnetization show a unique ADMR compared with all other FM AF A macrospin response model is established can...
Unidirectional spin Hall magnetoresistance (USMR) has been widely reported in the heavy metal/ferromagnet bilayer systems. We observe USMR $\mathrm{Pt}/\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Fe}}_{2}{\mathrm{O}}_{3}$ bilayers where $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Fe}}_{2}{\mathrm{O}}_{3}$ is an antiferromagnetic (AFM) insulator. Systematic field and temperature dependent measurements confirm magnonic origin of USMR. The appearance AFM-USMR driven by imbalance...
Hydrophobic deep eutectic solvents (HDESs) are a new generation of water-immiscible that have shown potential as green and sustainable reaction media for biocatalytic applications.
The topological Hall effect has been a primary indicator of nontrivial spin textures in magnetic materials. We observe the evidence $\mathrm{Pt}/{\mathrm{Cr}}_{2}{\mathrm{O}}_{3}$ bilayers grown on ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}(0001)$ and ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}(11\overline{2}0)$, where ${\mathrm{Cr}}_{2}{\mathrm{O}}_{3}$ epitaxial film is an antiferromagnetic insulator. exhibit resistivity for thicknesses below 6 nm near above room temperature, which N\'eel temperature...
We report the modification of magnetism in a magnetic insulator ${\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ thin film by topological surface states (TSS) an adjacent ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ film. Ferromagnetic resonance measurements show that TSS produces perpendicular anisotropy, results decrease gyromagnetic ratio, and enhances damping ${\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$. Such TSS-induced changes become more pronounced as temperature decreases from...
We report the direct observation of switching N\'eel vector antiferromagnetic (AFM) domains in response to electrical pulses micron-scale Pt/$\alpha$-Fe$_2$O$_3$ Hall bars using photoemission electron microscopy. Current lead reversible and repeatable switching, with current direction determining final state, consistent effect experiments that probe only spatially averaged response. also produce irreversible changes domain structure, even outside path. In both cases a fraction switch pulses....
Abstract Studies of laser-driven strong field processes subjected to a (quasi-)static have been mainly confined theory. Here we provide an experimental realization by introducing bichromatic approach for high harmonic generation (HHG) in dielectric that combines intense 70 femtosecond duration mid-infrared driving with weak 2 picosecond period terahertz (THz) dressing field. We address the physics underlying THz induced static symmetry breaking and its consequences on efficient...
As a new two-dimensional (2D) carbon hybrid material, graphdiyne has attracted much attention due to its good conductivity, adjustable electronic structure, and special electron transfer enhancement properties. In this work, graphdiyne/CuO NiMoO4/GDY/CuO composite catalysts were prepared by cross coupling method high temperature annealing method. The CuI introduced clever design not only acts as catalytic but also precursor of CuO. CuO produced the postprocessing improves inefficient charge...
The anomalous Nernst effect (ANE) is one of the most intriguing thermoelectric phenomena which has attracted growing interest both for its underlying physics and potential applications. Typically, a large ANE response observed in magnets with pronounced magnetizations or nontrivial Berry curvature. Here, we report significant signal compensated ferrimagnetic CoxGd1-x alloy films, exhibit vanishingly small magnetization. In particular, found that polarity dominated by magnetization...
Compensated ferrimagnets (FIMs) made of rare-earth transition-metal compounds have stimulated increasing interest for enabling fast spin dynamics. Taking $\mathrm{Fe}$-$\mathrm{Tb}$ as an example, substantial efforts been on the study compensated magnetism and its potential spintronic applications. Current-induced spin-orbit torque (SOT) switching evolution with ferrimagnetism in these compounds, however, remain to be systematically explored, which motivates present study. By combining...
The effect of spin currents on the magnetic order insulating antiferromagnets (AFMs) is fundamental interest and can enable new applications. Toward this goal, characterizing spin-orbit torques (SOTs) associated with AFM-heavy-metal (HM) interfaces important. Here we report full angular dependence harmonic Hall voltages in a predominantly easy-plane AFM, epitaxial c-axis oriented α-Fe_{2}O_{3} films, an interface to Pt. By modeling signals together parameters, determine amplitudes fieldlike...
Electrical switching of antiferromagnets is an exciting recent development in spintronics, which promises active antiferromagnetic devices with high speed and low energy cost. In this emerging field, there debate about the mechanisms current-driven antiferromagnets. Harmonic characterization a powerful tool to quantify current-induced spin-orbit torques spin Seebeck effect heavy-metal/ferromagnet systems. However, harmonic measurement technique has never been verified heterostructures. Here,...
Tyrosol is a principle phenolic compound present in olive oil and wine with great pharmacological potentials due to its strong antioxidant property. Its application can be highly extended by increasing lipophilicity through esterification. In this study, tyrosol esters were synthesized enzymatic transesterification of vinyl esters, commercial lipase from Novozymes (Novozym 435, Candida antarctica B (CALB) immobilized on macroporous acrylic resin beads) as the catalyst, both organic solvents...
Recently discovered as an intrinsic antiferromagnetic topological insulator, MnBi