A5007692839- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Acoustic Wave Resonator Technologies
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Quasicrystal Structures and Properties
- Ferroelectric and Negative Capacitance Devices
- Mineralogy and Gemology Studies
- Magnetic properties of thin films
- Nonlocal and gradient elasticity in micro/nano structures
- Smart Materials for Construction
- Dielectric properties of ceramics
- Archaeology and Rock Art Studies
- Gas Sensing Nanomaterials and Sensors
- Nuclear materials and radiation effects
- Nanocluster Synthesis and Applications
- Advanced ceramic materials synthesis
- 2D Materials and Applications
- Perovskite Materials and Applications
- Glass properties and applications
- Magneto-Optical Properties and Applications
- Dielectric materials and actuators
- Metamaterials and Metasurfaces Applications
- Advanced Photocatalysis Techniques
Songshan Lake Materials Laboratory
2021-2025
Institute of Physics
2021-2023
Chinese Academy of Sciences
1992-2021
Lanzhou University of Technology
2020-2021
University of Science and Technology of China
2018-2020
Antiferroelectrics characterized by voltage-driven reversible transitions between antiparallel and parallel polarity are promising for cutting-edge electronic electrical power applications. Wide-ranging explorations revealing the macroscopic performances microstructural characteristics of typical antiferroelectric systems have been conducted. However, underlying mechanism has not yet fully unraveled, which depends largely on atomistic processes. Herein, based atomic-resolution transmission...
Strongly correlated oxides exhibit multiple degrees of freedoms, which can potentially mediate exotic phases with exciting physical properties, such as the polar vortex recently found in ferroelectric oxide films. A is stabilized by competition between charge, lattice, and/or orbital freedom, displays vortex–ferroelectric phase transitions and emergent chirality, making it a potential candidate for designing information storage processing devices. Here, combination controlled film growth...
Periodic arrays of electric dipole waves in ferroelectric oxides can be stabilized at room temperature by quenching.
Abstract Topological domain structures have drawn great attention as they potential applications in future electronic devices. As an important concept linking the quantum and classical magnetism, a magnetic Bloch point, predicted 1960s but not observed directly so far, is singular point around which magnetization vectors orient to nearly all directions. Here we show polar points tensile-strained ultrathin ferroelectric PbTiO 3 films, are alternatively visualized by phase-field simulations...
Manipulating ferroic orders and realizing their coupling in multiferroics at room temperature are promising for designing future multifunctional devices. Single external stimulation has been extensively proved to demonstrate the ability of ferroelastic switching multiferroic oxides, which is crucial bridge ferroelectricity magnetism. However, it still challenging directly realize multi-field-driven magnetoelectric oxides as potential electrical Here, novel magneto-electric-optical BiFeO3...
Abstract Topological states have garnered enormous interest in both magnetic and ferroelectric materials for promising candidates of next-generation information carriers. Especially, multi-order topological structures with modulative charges are multi-state storage. Here, by engineering boundary conditions, we directly observe the self-assembly two-order radial vortices high-density BiFeO 3 nanostructures. The as-observed vortex features a doughnut-like out-of-plane polarization distribution...
Topological defects showing exotic properties and diverse functionalities provide us a potential utilization in nanoscale electronic devices. However, the formation mechanism density manipulation of topological such as center-type domains which are crucial for applications remain elusive. Usually, these generated by applying external electric fields ferroelectrics. In contrast, here we have prepared high-density center-divergent BiFeO3 self-assembled nanoislands deposited on both Nb-...
SrTiO3 is generally paraelectric with centrosymmetric structure exhibiting unique quantum fluctuation related ferroelectricity. Here we reveal highly polar and periodic polarization waves in at room temperature, which stabilized by tensile strains a sandwiched PbTiO3/SrTiO3/PbTiO3 structure. Scanning transmission electron microscopy reveals that a/c domain structures PbTiO3 layers exert the ultrathin layer consequently make states of SrTiO3. The as-received features peak ion displacement...
Superlattice structure provides an effective path for integrating multifunctional properties. The interfacial coupling in the ferromagnetic/ferroelectric superlattices is a possible route to achieve multiferroicity.
Controlling domain width, orientation, and patterns in oxide ferroelectrics are not only important for fundamental research but also potential electronic application. Here, a series of PbTiO3 thin films under various cooling rates were deposited on (110)-oriented NdScO3 substrates by pulsed laser deposition investigated using conventional transmission electron microscopy, Cs-corrected scanning TEM piezoresponse force microscopy. Contrast analysis diffraction revealed that a1/a2 large tensile...
Flexoelectricity is an effective tool in modulating the crystallographic structures and properties of oxides for multifunctional applications. However, engineering nonuniform strain to obtain tunable flexoelectric behaviors at atomic scale remains ongoing challenge conventional substrate-imposed ferroelectric films. Here, regulatable are demonstrated [110]-oriented BiFeO3 thin films, which triggered by strain-field coupling high-density interfacial dislocations. Using aberration-corrected...
High-index perovskite ferroelectric thin films possess excellent dielectric permittivity, piezoelectric coefficient, and exotic switching properties. They also exhibit complications in the ferroelastic domains, misfit dislocations, strain-relaxation behaviors. Exploring relationship of domains dislocations may be benefit for promoting high-quality growth these films. Here, strain field [101]-oriented PbTiO3/(La, Sr)(Al, Ta)O3 epitaxial were investigated by advanced aberration-corrected...
The physical properties of perovskite oxides are very sensitive to oxygen vacancy structures, and an unambiguous acquaintance structures thin films is the precondition for applications many functional devices. Here, we report critical thickness control over ordering structure in epitaxial LaCoO3–x (LCO) characterized by atomic resolution scanning transmission electron microscopy (STEM). Lattice mappings extracted from Cs-corrected STEM images demonstrate that planes vertically distributed...
Topological lattices such as vortices are of importance in both scientific research and application potential. Here, we observed periodic vortex-antivortex pairs PbTiO3/SrTiO3 multilayered films deposited on orthorhombic (110)-oriented GdScO3 by pulsed laser deposition. Domain patterns the PbTiO3 layers containing topological structures were analyzed detail using advanced transmission electron microscopy. It was found that increasing thickness, a/c domains with extra c will form triangle a...
Polar topologies have received extensive attention due to their exotic configurations and functionalities. Understanding responsive behaviors external stimuli, especially thermal excitation, is highly desirable extend applications high temperature, which still unclear. Here, combining in situ transmission electron microscopy phase-field simulations, the dynamics of flux-closure domains were illuminated PbTiO3/SrTiO3 multilayers. In-depth analyses suggested that topological transition...
Topological structures in ferroelectric materials play a crucial role the potential applications of high-density memories and are currently subject intensive interest. Interfaces with local symmetry breaking have garnered wide attention designing topological domains films by regulating different boundary conditions. Here, we present multiple polar nanodomains near heterointerfaces trilayered systems BiFeO3/GdScO3/BiFeO3 grown on [110]-oriented TbScO3 substrates. The formation stabilization...