A5036521470- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Surface and Thin Film Phenomena
- 2D Materials and Applications
- Ferroelectric and Piezoelectric Materials
- Cooperative Communication and Network Coding
- Advanced MEMS and NEMS Technologies
- Fault Detection and Control Systems
- Transition Metal Oxide Nanomaterials
- Force Microscopy Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Graphene research and applications
- Advanced Wireless Network Optimization
- Heusler alloys: electronic and magnetic properties
- Piezoelectric Actuators and Control
- Advanced MIMO Systems Optimization
- Wind and Air Flow Studies
- Risk and Safety Analysis
- Iron-based superconductors research
- ZnO doping and properties
- Fluid Dynamics and Vibration Analysis
- Oil and Gas Production Techniques
- Surface Roughness and Optical Measurements
- Mobile Ad Hoc Networks
Hefei University of Technology
2021-2024
Fudan University
2023
High Magnetic Field Laboratory
2014-2018
Chinese Academy of Sciences
2014-2018
University of Science and Technology of China
2014-2018
Nanjing University
2018
Hefei National Center for Physical Sciences at Nanoscale
2017-2018
Collaborative Innovation Center of Advanced Microstructures
2018
Hefei Institutes of Physical Science
2018
Arizona State University
2008
As a quasi-layered ferrimagnetic material, Mn3Si2Te6 nanoflakes exhibit magnetoresistance behavior that is fundamentally different from their bulk crystal counterparts. They offer three key properties crucial for spintronics. First, at least 106 times faster response compared to exhibited by crystals has been observed in current-controlled resistance and magnetoresistance. Second, ultralow current density required modulation (∼5 A/cm2). Third, electrically gate-tunable realized. Theoretical...
We have designed, implemented, and tested a novel inertial piezoelectric motor (IPM) that is the first IPM to controllable total friction force, which means it sticks with large forces slips severely reduced forces. This allows work greater robustness produce larger output force at lower threshold voltage while also providing higher rigidity. new design can be dramatically or even canceled where necessary by pushing clamping points ends of tube contains sliding shaft inside in opposite...
Node cooperation is one unique feature distinguishing wireless sensor networks (WSNs) from traditional cellular networks. In this paper, we investigate joint clustering and optimal cooperative routing, where neighboring nodes dynamically form coalitions cooperatively transmit packets to the next hop destination. We show that network can be modeled as an edge-weighted graph, based on which minimum energy routing characterized by using standard shortest path algorithm. then focus...
Distributed opportunistic scheduling (DOS) protocols are proposed for multiple-input multiple-output (MIMO) ad-hoc networks with contention-based medium access. The distinguish themselves from other existing works by their explicit design system throughput improvement through exploiting spatial multiplexing and diversity in a distributed manner. As result, multiple links can be scheduled to simultaneously transmit over the channels formed transmit/receiver antennas. Taking into account...
Distributed opportunistic scheduling is studied for wireless ad-hoc networks, where many links contend one channel using random access. In such distributed (DOS) involves a process of joint probing and scheduling. It has been shown that under perfect estimation, the optimal DOS maximizing network throughput pure threshold policy. this paper, formalism generalized to explore noisy transmission rate needs be backed off from estimated reduce outage. policy remains threshold-based, turns out...
A homebuilt low-temperature scanning tunneling microscope (STM) featuring a detachable scanner based on double slider design, along with reliable transfer mechanism for tip and sample exchange, is present. The coarse motor decoupled from the scanner, which prevents instabilities including vibrations drifts entering tip-sample loop thus improves performance of STM. In addition, in situ exchange tips samples can be implemented easily reliably using winch-type mechanism. Atomically resolved...
As a prototype of strongly correlated electron system, bulk vanadium dioxide (VO 2 ) exhibits large and reversible metal–insulator transition (MIT) near 340 K, concomitantly accompanied by monoclinic–rutile structural phase transformation (SPT). In this study, we systematically investigated the SPT across MIT in (010)-VO /(0001)-Al O 3 epitaxial thin film simultaneously determining three lattice constants ( , b c mismatch angle Δβ using high-resolution X-ray diffraction. The were...
In this work, we investigate the influence of electric fields (E-fields) on room-temperature magnetotransport behavior an artificial multiferroic heterostructure, a Conetic alloy (Ni 77 Fe 14 Cu 5 Mo 4 ) thin film/Pb(Mg 1/3 Nb 2/3 0.7 Ti 0.3 O 3 (011). When external magnetic field is parallel to applied current, switching increases from 0.8 3.3 Oe at 0 and 8 kV/cm, respectively, corresponding magnetoresistance (MR) ratio 20 respectively decreases 0.14% 0.03% kV/cm. However, when...
Heat exchangers play essential roles in power generation and petrochemical industry. Although physical sensors are widely deployed the process industry, timely fault detection diagnosis method remain a significant challenge to its safe reliable operation for accurate equipment condition monitoring. To address this challenge, paper proposes new virtual sensing online of heat exchangers. The models constructed by incorporating failure mechanism inference analytics. Complemented high-precision...
As a quasi-layered ferrimagnetic material, Mn$_3$Si$_2$Te$_6$ nanoflakes exhibit magnetoresistance behaviour that is fundamentally different from their bulk crystal counterparts. They offer three key properties crucial for spintronics. Firstly, at least 10^6 times faster response comparing to exhibited by crystals has been observed in current-controlled resistance and magnetoresistance. Secondly, ultra-low current density required modulation (~ 5 A/cm$^2$). Thirdly, electrically gate-tunable...
The giant spin–orbit torque (SOT) generated by topological surface states in insulators (TIs) provides an energy-efficient writing method for magnetic memory. In this study, we demonstrate a insulator/spin valve (TI/SV) device that operates at room temperature. An ultrathin, high-quality TI (Bi0.5Sb0.5)2Te3 (BST) thin film is epitaxially grown as functional layer on (0001)-Al2O3 substrate via molecular beam epitaxy ultrahigh vacuum. Subsequently, Ta/CoFe/Cu/CoFe/IrMn layers are BST/Al2O3...
Mixed-dimensional van der Waals (vdW) heterostructures, integrated two-dimensional (2D) atomic crystals with three-dimensional (3D) functional materials, offer a powerful means to manipulating physical properties and generating unprecedented functionalities. Understanding interfacial couplings at those hetero (homo)-interfaces is indispensable for exploring new optical electronic devices. Herein, we investigated dynamically phase-transition-driven strain coupling across vdW heterointerface...
We present a new stacked TunaDrive motor with two intact piezoelectric stacks being spring-clamped by pair of parallel highly polished zirconia ceramic rods. Compared the earlier version we presented five stacks, it has simpler and more compact structure is much easier to build. Although usage material cut ∼35%, can still provide large output force ∼1.92 N, which nearly same as that version. The simple symmetrical structure, high rigidity, make an ideal tool for coarse approach nanometer precision.
This paper reports that the in situ growth magnetic field (Hg) during magnetic-phase CoFeB deposition impacts electric-field control of anisotropy Co40Fe40B20/(011)-Pb(Mg1/3Nb2/3)0.7Ti0.3O3 [CoFeB/(011)-PMN-PT] composite multiferroic heterostructures at room temperature. In Hg1 mode (in Hg along [011¯] direction ferroelectric PMN-PT substrate), electric-field-controlled modulation ratios coercivity HC and saturation HS are approximately −47% +156%, respectively. However, Hg2 [100] substrate)...
Defect detection of the casting’s surface is great importance for its quality inspection. There are a series challenges clear imaging and weak contrast between defects surroundings casting defects. In this paper, we propose feasible scheme that an system could combine physical exposure compensation with algorithm to deal difficulty large differences in light reflectivity scattering machining surfaces. Then, present image preprocessing which based on Hough line transform Canny edge detection....
Because of the wide selectivity ferromagnetic and ferroelectric (FE) components, electric-field (E-field) control magnetism via strain mediation can be easily realized through composite multiferroic heterostructures. Here, an MgO-based magnetic tunnel junction (MTJ) is chosen rationally as constitution a high-activity (001)-Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 (PMN-0.3PT) single crystal selected FE component to create MTJ/FE hybrid structure. The shape tunneling magnetoresistance (TMR) versus...
Building robust deep neural networks (DNNs) against adversarial attacks is an important but challenging task. Previous defense approaches mainly focus on developing new model structures or training algorithms, they do little to tap the potential of instances, especially instances with patterns carring innate robustness. In this paper, we show that and non-robust in dataset, though are both for test performance, have contrary impacts robustness, which makes it possible build a highly by...
We present a homebuilt scanning tunneling microscope (STM) which employs an inner-wall polished sapphire guiding tube as rail for the scanner to form short tip-sample mechanical loop. The is mounted on square rod housed in and held by spring strip. stiff allows STM body be made simple, compact rigid form. Also material of improves thermal stability its good conductivity. To demonstrate performance STM, high quality atomic-resolution images oriented pyrolytic graphite were given.
We present atomic-resolution images of TiSe2, MoTe2 and TaS2 single crystals in liquid condition using our home-built scanning tunneling microscopy (STM). By facilely cleaving liquid, we were able to keep the fresh surface not oxidized within a few hours. Using high-stable STM, have obtained atomic resolution TiSe2 accompanied with atom defects as well triangle solution for first time. Besides, superstructure hexagonal charge-density wave domain structure nearly commensurate phase also at...
This letter investigates the influence of electric fields (E-fields) on room-temperature magnetoresistance (MR) behavior an artificial multiferroic heterostructure, a Conetic alloy (Ni77Fe14Cu5Mo4) thin film/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 (011) ferroelectric crystal. When magnetic field is parallel (perpendicular) to applied current, switching decreases (increases) from 0.8 (10.1) 3.3 (1.7) Oe at 0 and 8 kV/cm, yielding E-field-induced tunabilities approximately +313% (−83%), respectively. The...