A5034901549- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Electron and X-Ray Spectroscopy Techniques
- Electronic and Structural Properties of Oxides
- Iron-based superconductors research
- MXene and MAX Phase Materials
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Thin-Film Transistor Technologies
- Photochemistry and Electron Transfer Studies
- Silicon and Solar Cell Technologies
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Rare-earth and actinide compounds
- Physics of Superconductivity and Magnetism
- Intermetallics and Advanced Alloy Properties
- Advanced Condensed Matter Physics
- Iron oxide chemistry and applications
- Laser-Ablation Synthesis of Nanoparticles
- Microwave Dielectric Ceramics Synthesis
- Perovskite Materials and Applications
- Ferroelectric and Negative Capacitance Devices
Hebei University
2012-2024
Numerical Method (China)
2022
Xuzhou Children Hospital
2019
Material Sciences (United States)
2015
Hebei University of Technology
2015
Chinese Academy of Sciences
2011
We have performed an angle-resolved photoemission spectroscopy study of the new iron-based superconductor ${\mathrm{K}}_{0.8}{\mathrm{Fe}}_{1.7}{\mathrm{Se}}_{2}$ (${T}_{c}\ensuremath{\sim}30\text{ }\text{ }\mathrm{K}$). Clear band dispersion is observed with overall bandwidth renormalized by a factor 2.5 compared to our local density approximation calculations, indicating relatively strong correlation effects. Only electronlike crosses Fermi energy, forming nearly circular surface (FS) at...
Antiferroelectric materials with double hysteresis loops are attractive for energy storage applications, which becoming increasingly important power electronics nowadays. Among them, AgNbO3 based lead-free ceramics have attracted intensive interest as one of promising environmental-friendly candidates. However, most the suffers from low dielectric breakdown strength (Eb). The limitation Eb is broken to some extent in this work. Here, epitaxial films were fabricated by pulsed laser...
Abstract Perovskite oxides and organic–inorganic halide perovskite materials, with numerous fascinating features, have been subjected to extensive studies. Most of the properties materials are dependence on their ferroelectricity that denoted by remanent polarization ( P r ). Thus, increase in films is mainly an effort material physics. At present, commonplace improvement schemes, i.e., controlling crystallinity, post‐annealing using a high‐temperature process, normally used. However,...
The adsorption and dissociation of oxygen molecule on Ti 3 Al (0001) surface have been investigated by density functional theory (DFT) with the generalized gradient approximation (GGA). All possible sites including nine vertical fifteen parallel O 2 are considered surface. It is found that all molecules dissociate except for three after structure optimization. This indicates prefer to junction site between atoms. Oxygen atoms coming from tend occupy most stable distance – related valence...
Adsorption energies and density of states for O atoms adsorption on the Ti 3 Al (0001) surface have been calculated using first‐principles calculations based functional theory. It is found that order atom associated with energy as well distance because interaction. The mainly depends bond number strength between atoms, site rich‐Ti (H I HCP ) first priority. decreases increase oxygen coverage characteristics valence d ‐orbitals transition metals surface. Furthermore, indicates hybridization...
Using the first principle method, we investigate influence of Sr/Ti ratio on atomic structure and dislocation behavior Srn+1TinO3n+1(Ruddlesden—Popper phase) SrnTin+1O3n+2 (Magnéli phase). A linear lattice expansion versus exhibits in Ruddlesden—Popper Magnéli phases. The phase has lower formation energy superior structural stability than phase. two phases show different behaviors it is found that a possibly preferred slip system 〈110〉 {110} emerges phases, dislocations are more likely to...
A hysteresis loop of minority carrier lifetime vs voltage is found in polystyrenesulfonate (PSS)/Si organic-inorganic hybrid heterojunctions, implying an interfacial memory effect. Capacitance-voltage and conductance-voltage loops are observed reveal a window. switchable interface state, which can be controlled by charge transfer based on electrochemical oxidation/deoxidation process, suggested to responsible for this We perform first-principle total-energy calculations the influence...
SrRuO3(SRO)/Ni-Al/Cu/Ni-Al/SiO2/Si heterostructures annealed at various temperatures are found to remain intact after annealing. Moreover, a SRO/Pb(Zr0.4Ti0.6)O3 (PZT)/SRO capacitor is grown on Ni-Al/Cu/Ni-Al/SiO2/Si heterostructure, which tested up investigate the reliability of memory capacitor. It that besides good fatigue resistance and retention characteristic, capacitor, measured 5 V room temperature, possesses large remnant polarization small coercive voltage 0.83 V, respectively. Its...
Abstract This paper describes the realization of a homogeneous dielectric barrier discharge (DBD) in argon at atmospheric pressure. The effect morphology surface (especially covered by hollow ceramic beads (99% Al 2 O 3 ) with different diameters) on is investigated. With dielectrics, DBD presents two modes: filamentary mode and mode. Fast photography shows that operates streamer discharge, Townsend regime. It found can be generated within certain voltage range. amplitude range decreases,...
Abstract Interface strain significantly affects polarization in ferroelectric devices. In this paper, an innovative strategy is proposed to substantially enhance using ultra‐thin “soft‐buffer‐layer” (SBL), which reduces dislocation density and increases the tetragonality of thin films because small elastic constants Ti 3 Al along x y axes. And work, it demonstrated that PbZr 0.4 0.6 O (PZT) are perfect c‐axis‐oriented epitaxial structures on (001) SrTiO (STO) substrates. The PZT capacitor...
The epitaxial-Si (epi-Si) growth on the crystalline Si (c-Si) wafer could be tailored by working pressure in plasma-enhanced chemical vapor deposition (PECVD). It has been systematically confirmed that epitaxial at hydrogenated amorphous silicon (a-Si:H)/c-Si interface is suppressed high (hp) and occurs low (lp). hp a-Si:H, as a purely layer, incorporated lp-epi-Si/c-Si interface. We find that: (i) can also occur a-Si:H coated c-Si long this layer thin enough; (ii) with increase of inserted...
Self‐assembled 1–3‐type Fe:LaSrFeO 4 epitaxial nanocomposite film has been prepared using pulsed laser deposition by decomposing a ceramic La 0.5 Sr FeO 3 target in high‐vacuum system. Impacts of temperature and energy density on the evolution microstructure crystallinity have investigated. It is found that Fe nanopillars are highly c ‐axis oriented at lower temperature, higher however, quality decreases if further increased. Besides can also be influenced density. Only specific an density,...
The generation and decay of photoelectrons is an important factor in improving photographic efficiency silver halide crystals. Microwave absorption phase-sensitive detection technology designed by our experiment group, was used to non-contact measure the transmission characteristic photoelectronic [Fe(CN)6]<sup>4-</sup> uniformly-doped AgCl microcrystals. signal free shallow-trapped were measured in-phase. It found that time cubic microcrystals doped with longer than undoped samples at first...
Magnetostrictive material is an important magnetic functional and can be applied in many fields such as micro-sensors micro-actuators <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[1-3]</sup> . Among magnetostrictive materials, non-rare-earth Fe-based alloys have gained great interest due to their high mechanical strength, good ductility, large magnetostriction at low saturation fields, imposed-stress levels, relatively cost...
The characteristic of semi-conduct will be influenced, when environmental conditions act on it. Silver halide microcrystals, kind false compositive is a typical photoelectric material. In this work, the silver chloride microcrystals adsorbing dye are excited by laser with different wavelengths, photoelectron signals which measured microwave adsorption dielectric spectrum equipment high time resolution (1ns). It found that decay pure emulsion 355nm and 532nm respective 109ns 47ns; sensitized...