A5082499281- Magnetic properties of thin films
- Characterization and Applications of Magnetic Nanoparticles
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- ZnO doping and properties
- Helicobacter pylori-related gastroenterology studies
- Nanoparticle-Based Drug Delivery
- Magnetic and transport properties of perovskites and related materials
- Theoretical and Computational Physics
- Magnetic Field Sensors Techniques
- Galectins and Cancer Biology
- Gastric Cancer Management and Outcomes
- Magnetic Properties and Applications
- Electric Power Systems and Control
- Surface and Thin Film Phenomena
- Advanced Memory and Neural Computing
- Soil Moisture and Remote Sensing
- Micro and Nano Robotics
- Geophysics and Gravity Measurements
- Magnetic Properties and Synthesis of Ferrites
- Hydrogels: synthesis, properties, applications
- Video Surveillance and Tracking Methods
- Advanced Condensed Matter Physics
- Lattice Boltzmann Simulation Studies
- Aerosol Filtration and Electrostatic Precipitation
Beijing Union University
2024
Xi’an University of Posts and Telecommunications
2023
Capital Normal University
2021-2022
National Taiwan University
2015
University of Massachusetts Amherst
2008-2012
Simon Fraser University
2011
RIKEN
2005-2007
RIKEN Center for Emergent Matter Science
2006-2007
Japan Science and Technology Agency
2005-2006
Probiotics, recognized as beneficial and active microorganisms, often face challenges in maintaining their functionality under harsh conditions such exposure to stomach acid bile salts. In this investigation, we developed probiotic microcapsules assessed protective effects underlying mechanisms a murine model of dextran sulfate sodium (DSS)-induced colitis using male C57BL/6J mice. The administration the significantly mitigated body weight loss, prevented colon length shortening, decreased...
Strongly correlated electron systems with a kagome lattice can host abundant exotic quantum states such as superconductivity and spin/charge density waves (CDW) due to the complicated interactions between different degrees of freedoms in framework unique two-dimensional geometrically frustrated structure. Recently, successive orders A-type antiferromagnetism (AFM), $2\times2\times2$ CDW canted double-cone AFM have been manifested upon cooling magnetic FeGe. However, mechanism order its...
Abstract Reducing nanoparticle (NP) dosage for hyperthermia therapy has remained a great challenge. In this work, efficiencies of alternating current (AC) magnetic field and near‐infrared (NIR) heating are simultaneously enhanced by Zn Co co‐doping magnetite NPs. The optimum anisotropy maximized loss power under each is achieved tuning the doping concentration. specific 0.3 0.08 Fe 2.62 O 4 @SiO 2 NPs reaches 2428 W g −1 an AC 27 kA m at 430 kHz; 12 296 NIR laser irradiation 808 nm 2.5 cm −2...
The authors fabricated a current-perpendicular-to-plane pseudo-spin-valve nanopillar comprising thick and thin Co rings with deep submicron lateral sizes. dc current can effectively induce the flux-closure vortex states in desired chiralities. Abrupt transitions between are also realized by detected giant magnetoresistance effect. Both Oersted field spin-transfer torque found important to magnetic transitions, but former is dominant. They be designed cooperate each other vortex-to-vortex...
Micromagnetic simulations of the vortex switching process thin ferromagnetic rings under application a circular field, as if created from current-carrying wire passing through ring center, reveal that for with sub-micron dimensions and thicknesses on order exchange length, to occurs nucleation annihilation multiple 360° domain walls (DWs). The DWs can be characterized by their circulation relative circulation; form in pairs opposite topological indices. DW same annihilates first, which has...
Abstract Demonstrating highly efficient alternating current (AC) magnetic field heating of nanoparticles in physiological environments under clinically safe parameters has remained a great challenge, hindering clinical applications hyperthermia. In this work, exceptionally high loss power bone cement the safety limit AC parameters, incorporating direct field‐aligned soft Zn 0.3 Fe 2.7 O 4 with low concentration, is reported. Under an kA m −1 at 430 kHz, aligned 0.2 wt% achieves temperature...
Abstract Background Helicobacter pylori ( H. ) eradication plays a crucial role in gastric cancer prevention, but the antimicrobial resistance of is obstructing this elimination process. In study, we developed nanoclusters (NCs) from Zn 0.3 Fe 2.7 O 4 nanoparticles using poly(ethylene glycol)-b-poly(ε-caprolactone)-based nanocarrier as an innovative antibiotic-independent management. Results The nanocluster showed minimal toxicity and maximal biocompatibility. With low concentration (50...
We present a formalism determining spin-polarized current and electrochemical potential inside arbitrary electric circuit within diffusive regime for parallel/antiparallel magnetic states. When nano-structure is expressed by 3-dimensional (3D) circuit, we can determine 3D distributions it. apply this technique to (Cu/Co) pillar structures, where terminated either infinitely large Cu layer, or wire with identical cross-sectional area as itself. found that layers work strong spin-scatterers,...
Taking into account the thermal effect, we verify that strong spin relaxation in capping layer of a magnetic nanopillar significantly affects current-induced magnetization switching behavior by reducing critical current density. Theoretical calculations reveal increasing enhances spin-polarized while suppresses contribution accumulation to switching. The results suggest current, rather than accumulation, dominates
Vertical stacks of two Co rings with deep submicron lateral sizes and different thicknesses are fabricated studied. The experimental results suggest the existence a metastable domain wall structure revealed by micromagnetics simulation. technologically important vortex-vortex switching is found dominated annular Oersted field perpendicularly injected dc, but also significantly affected spin-transfer torque. efficiency torque process discussed.
In this work we develop prototype elements for multistate (beyond binary) perpendicular data storage using interacting nanomagnet clusters. This experimental confirms earlier theoretical that predicted multiple discrete values of stable remanent magnetization such The fabrication scheme is based on ultrahigh resolution electron beam lithography performed a thin suspended silicon nitride membrane to reduce the secondary backscattered electrons from substrate. A Co cluster array deposited into...
With the experimental results obtained with a special nanopillar structure and calculations based on one-dimensional diffusion equations, respective contributions to spin torque from accumulation local current are quantitatively deduced. The for typical show that contributes about 90% of necessary antiparallel parallel switching, while switching is totally dominated by current. Both variations in should be considered any effort reduce critical density. However it seems more effective...
Because of the capability to switch magnetization a nanoscale magnet, spin transfer effect is critical for application magnetic random access memory. For this purpose, it important enhance current carried by charge current. Calculations based on diffusive spin-dependent transport equations reveal that magnitude can be tuned modifying ferromagnetic layer and relaxation process in device. Increasing thickness found both accumulation. On other hand, strong capping also increases but suppresses...
We present a formalism to determine the three-dimensional (3D) distribution of spin-polarized current and electrochemical potential inside arbitrary nanostructures such as magnetic/nonmagnetic layered pillars, etc. The model is based on dividing nanostructure into 3D electric circuit spin-dependent-resistor elements, each which propagation treated one-dimensional problem. solutions presented here are calculated in diffusive transport regime for parallel/antiparallel magnetic states.
The temperature dependence of the switching current a magnetic nanopillar is investigated from 10to290K. According to probability measurement with pulsed current, and differential resistance sweeping dc intrinsic currents increase decreasing temperature. Transport calculations show that this closely related reduced spin accumulation polarization electrical at low temperatures, attributed varied transport parameters. conclusion in accordance difference between antiparallel parallel configurations.
Magnetic nanopillars with variable top electrodes were fabricated to clarify the roles of spin current and accumulation in current-induced magnetic switching. The critical switching is significantly increased when size electrode comparable that nanopillar. This result implies dominant contribution not accumulation, but current.
Bone Tumor Suppression Magnetic bone cement incorporating magnetically soft zinc ferrite nanoparticles and aligned in a direct current magnetic field realized exceptionally high heating power live animals under clinically safe parameters for hyperthermia. of osteosarcoma rabbits by hyperthermia substantially enhances survival rate. More details can be found article number 2104626 Shuli He, Qinggang Ge, Yang Lv, Hao Zeng, co-workers.
In this paper, magnetic switching due to non-local spin injection into small ferromagnetic particle in a laterally ferromagnetic/nonmagnetic hybrid structure is investigated. Lateral multi-terminal spin-injection device fabricated by means of the conventional lift-off technique. The consists two large Permalloy (Py) pads, Cu cross and Py particle. Au wires are connected order reduce total resistance spin-valve signal measured found be 0.3 m/spl Omega/. This proves that current from pad...
In order to enhance the storage density of information in magnetic devices, scientists pay most attention develop novel materials that possessing magnetoresistance (MR). them, giant (GMR) has been extensively explored memory and logic devices for which spin degree freedom dominates mechanism manipulation. The major challenge spintronics is how spin-polarized currents transforming information. Half metals are recommended as best candidates spin-based electronics, highly electrons.