A5102812396- Ferroelectric and Piezoelectric Materials
- Shape Memory Alloy Transformations
- Multiferroics and related materials
- Dielectric properties of ceramics
- Magnetic and transport properties of perovskites and related materials
- Microwave Dielectric Ceramics Synthesis
- Thermal Expansion and Ionic Conductivity
- Magnetic Properties of Alloys
- Cold Atom Physics and Bose-Einstein Condensates
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Advanced Chemical Physics Studies
- Thermal properties of materials
- Advanced Thermoelectric Materials and Devices
- Advanced Frequency and Time Standards
- Magnetic Properties and Applications
- Plasmonic and Surface Plasmon Research
- Quantum, superfluid, helium dynamics
- Gas Sensing Nanomaterials and Sensors
- Heusler alloys: electronic and magnetic properties
- Magnesium Oxide Properties and Applications
- Metal and Thin Film Mechanics
Luoyang Institute of Science and Technology
2016-2025
Fujian Normal University
2021-2023
Henan University of Science and Technology
2020-2021
Nanjing University
2016-2020
Collaborative Innovation Center of Advanced Microstructures
2016-2018
National Laboratory of Solid State Microstructures
2017
National Institute for Materials Science
2001-2006
Institute of Physics
1996
A method using a low-temperature Si (LT-Si) buffer layer is developed to grow SiGe epilayer with low density of dislocations on substrate by molecular-beam epitaxy. In this method, LT-Si used release the stress layer. The samples have been investigated x-ray double-crystal diffraction and transmission electron microscopy. results indicate that effective suppress threading dislocations.
[Formula: see text] Bi[Formula: text]Na[Formula: text]TiO 3 -x SrTiO lead-free ceramics were prepared using the traditional solid-state method to investigate influences of content on material’s phase structure, microstructure, dielectric and energy storageproperties. All investigated compositions possess a stable perovskite structure with coexistence R T phase, proportion in samples decreases from 71.57% ([Formula: text]) 28.61% increase ST content. The introduction leads anomalies at Ts Tm,...
Pr-doped SrTiO3 ceramics were fabricated by the conventional solid-state reaction method. Pr-doping greatly decreased lattice parameters and average grain size of sample. Two thermally activated dielectric relaxations found for low- high-temperature relaxations, respectively. By means a detailed analysis, low-temperature relaxation was ascribed to electric hopping between Pr3+ Pr4+ induced Pr-doping, origin changed from oxygen vacancies polar nanoregions with increase Pr content.
The MnCoSi compound is a potential magnetostriction material since the magnetic field can drive metamagnetic transition from an antiferromagnetic phase to high magnetization in it, which accompanies large lattice distortion. However, driving field, hysteresis, and poor mechanical properties seriously hinder its application for magnetostriction. By substituting Fe Mn introducing vacancies of element, textured dense Mn0.97Fe0.03CoSi Mn0.88CoSi compounds are prepared through high-magnetic-field...
Gold nano-star particles (GNS) have broad application prospects in Raman enhancement, photovoltaic, and catalysis fields because of the hot spot effect their tip structure. However, metal nanoparticles will accumulate heat during applications high-power laser-focused irradiation, which may lead to morphological degradation nanoparticles. In this paper, we studied annealing temperature on surface structure GNS. Firstly, GNS with multi-tip were synthesised by two-step method, thin films...
A thermal conductivity measurement system using a steady heat flow method has been used to study crystal perfection at low temperatures. The range was from 1.5 300 K with magnetic field of up 8 T. overall absolute error estimated be within 4% without the and 8% 5 Rectangular samples minimum size 2×2×10 mm3 can measured. phonon scattering mechanism analysed Callaway model for isotopically enriched β-rhombohedral single crystals boron transparent polycrystals yttrium aluminium garnet (YAG)....
By applying external stimulus (temperature or magnetic field), MnCoGe-based compounds undergo a martensitic transformation from hexagonal Ni2In-type to orthorhombic TiNiSi-type structure accompanied with giant negative thermal expansion, which suggests large magnetic-field-induced strain. However, these naturally collapse into powders and are difficult be oriented, hinder their applications for magnetostrain. In this paper, magnetic-field-aligned Mn0.965CoGe compound was prepared by bonding...
Finding materials with negative thermal expansion (NTE) property is challenging. Tuning NTE of fundamental and technological importance. Pressure enhanced behavior in 2H CuScO2 found expounded using density functional theory (DFT) quasi-harmonious approximation (QHA). The frequencies low energy modes Grüneisen parameters decrease under pressure, but the bulk modulus increases pressure. transverse vibration Cu atoms becomes stronger pressure undergo softening. These factors including...
The MnNiFeGe alloy is prepared by high-pressure annealing method. It found that the martensitic transformation temperature after of this decreases with increasing thermal hysteresis. Besides, another magnetic phase transition above observed, which due to existence a large amount retained austenite induced annealing. As result, shows two positive entropy change peaks, corresponding ferromagnetic and transformation, respectively. transitions, variable-temperature crystal-structure evolution,...
Abstract With the rapid development of atom interference technology, multi-loop interferometers are widely used in high-precision measurement various physical constants and testing gravity-related effects. However, ground-based experiments, systematic error contribution by classical effects is an important factor that affects experimental accuracy gravitational effect detection. Based on this, we atomic wave-function evolution-phase accumulation method to provide a high-order phase...