A5061266995- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Electronic and Structural Properties of Oxides
- Magnetic Properties and Applications
- Mass Spectrometry Techniques and Applications
- Dielectric properties of ceramics
- Magnetic Properties of Alloys
- Acoustic Wave Resonator Technologies
- Physics of Superconductivity and Magnetism
- Metabolomics and Mass Spectrometry Studies
- Heusler alloys: electronic and magnetic properties
- ZnO doping and properties
- MXene and MAX Phase Materials
- Transition Metal Oxide Nanomaterials
- Analytical chemistry methods development
- Quantum and electron transport phenomena
- Analytical Chemistry and Chromatography
- 2D Materials and Applications
- Metal and Thin Film Mechanics
- Topological Materials and Phenomena
- Magneto-Optical Properties and Applications
- Advancements in Solid Oxide Fuel Cells
China Southern Power Grid (China)
2025
Durham University
2014-2024
Guiyang Medical University
2024
Xiamen University
2024
Zhongyuan University of Technology
2022-2023
John Wiley & Sons (United States)
2023
Hudson Institute
2023
Liechtenstein Institute
2023
University of Exeter
2007-2022
University of Maine
2020
Piezoelectric materials, which convert mechanical to electrical energy and vice versa, are typically characterized by the intimate coexistence of two phases across a morphotropic phase boundary. Electrically switching one other yields large electromechanical coupling coefficients. Driven global environmental concerns, there is currently strong push discover practical lead-free piezoelectrics for device engineering. Using combination epitaxial growth techniques in conjunction with theoretical...
Piezoelectric and ferroelectric properties in the two dimensional (2D) limit are highly desired for nanoelectronic, electromechanical, optoelectronic applications. Here we report first experimental evidence of out-of-plane piezoelectricity ferroelectricity van der Waals layered ${\alpha}$-In2Se3 nano-flakes. The non-centrosymmetric R3m symmetry samples is confirmed by scanning transmission electron microscopy, second-harmonic generation, Raman spectroscopy measurements. Domains with opposite...
A reversal of magnetization requiring only the application an electric field can lead to low-power spintronic devices by eliminating conventional magnetic switching methods. Here we show a nonvolatile, room temperature determined in ferromagnet-multiferroic system. The effect is reversible and mediated interfacial coupling dictated multiferroic. Such electric-field control magnetoelectric device demonstrates avenue for next-generation, low-energy consumption spintronics.
The transport physics of domain wall conductivity in La-doped bismuth ferrite (BiFeO3) has been probed using variable temperature conducting atomic force microscopy and piezoresponse samples with arrays walls the as-grown state. Nanoscale current measurements are investigated as a function bias shown to be consistent distinct electronic properties at leading changes observed local conductivity. Our observation is well described within band picture conduction. Finally, we demonstrate an...
We report the formation of a novel ferromagnetic state in antiferromagnet ${\mathrm{BiFeO}}_{3}$ at interface with ferromagnet ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$. Using x-ray magnetic circular dichroism Mn and Fe ${L}_{2,3}$ edges, we discovered that development this spin structure is strongly associated onset significant exchange bias. Our results demonstrate directly related to an electronic orbital reconstruction interface, which supported by linearly polarized...
We report a large and nonvolatile bipolar-electric-field-controlled magnetization at room temperature in Co(40)Fe(40)B(20)/Pb(Mg(1/3)Nb(2/3))(0.7)Ti(0.3)O(3) structure, which exhibits an electric-field-controlled looplike magnetization. Investigations on the ferroelectric domains crystal structures with situ electric fields reveal that effect is related to combined action of 109° ferroelastic domain switching absence magnetocrystalline anisotropy Co(40)Fe(40)B(20). This work provides route...
We report direct experimental evidence for a room-temperature, $\ensuremath{\sim}130\text{ }\text{ }\ensuremath{\mu}\mathrm{C}/{\mathrm{cm}}^{2}$ ferroelectric polarization from the tetragonal-like ${\mathrm{BiFeO}}_{3}$ phase. The physical origin of this remarkable enhancement has been investigated by combination x-ray absorption spectroscopy, scanning transmission electron microscopy, and first principles calculations. A large strain-induced Fe-ion displacement relative to oxygen...
The control of material interfaces at the atomic level has led to novel interfacial properties and functionalities. In particular, study polar discontinuities between complex oxides lies frontier modern condensed matter research. Here we employ a combination experimental measurements theoretical calculations demonstrate bulk property, namely ferroelectric polarization, heteroepitaxial bilayer by precise atomic-scale interface engineering. More specifically, is achieved exploiting valence...
We demonstrate an approach to create a one-dimensional nanoscale array of domain walls in epitaxial La-substituted BiFeO(3) films. have used DyScO(3) (110)(O) single-crystal substrate provide anisotropic strain exclude two the possible structural variants. Furthermore, through careful control electrostatic boundary conditions, such as thickness SrRuO(3) bottom electrode induce self-poling effects, we can choose obtain either 109 degrees or 71 periodic walls. Detailed measurements structures...
Carbon nanodots were applied for the first time as a new matrix analysis of low-molecular-weight compounds by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) in both positive- and negative-ion modes. A wide range small molecules including amino acids, peptides, fatty well β-agonists neutral oligosaccharides analyzed MALDI MS with carbon matrix, lowest 0.2 fmol limits-of-detection obtained octadecanoic acid. Clear sodium potassium adducts...
Abstract Predicting and understanding the cation distribution in spinels has been one of most interesting problems materials science. The present work investigates effect redistribution on structural, electrical, optical magnetic properties mixed-valent inverse spinel NiCo 2 O 4 (NCO) thin films. It is observed that films grown at low temperatures ( T < 400 °C) exhibit metallic behavior while higher > are insulators with lower ferrimagnetic-paramagnetic phase transition temperature. So...
The presence of a variety structural variants in BiFeO3 thin films give rise to exotic electric-field-induced responses and resulting electromechanical as large 5%. Using high-resolution X-ray diffraction scanning-probe-microscopy-based studies the numerous phases present at phase boundaries are identified an intermediate monoclinic phase, addition previously observed rhombohedral- tetragonal-like phases, is discovered.
Domain walls in multiferroics can exhibit intriguing behaviors that are significantly different from the bulk of material. We investigate strong magnetoresistance domain model multiferroic BiFeO3 by probing ordered arrays 109° with temperature- and magnetic-field-dependent transport. observe temperature-dependent variations transport mechanism magnetoresistances as large 60%. These results suggest locally breaking symmetry a material, such at structural interfaces, one induce emergent...
Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) is a label-free technique for identifying multiplex metabolites and determining both their distribution relative abundance in situ. Our previous study showed that N-(1-naphthyl) ethylenediamine dihydrochloride (NEDC) could act as matrix time-of-flight (LDI-TOF MS) detection of oligosaccharides solution. In the present study, NEDC-assisted LDI-TOF MSI yielded many more endogenous compound peaks between m/z 60...