A5100706512- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Advanced Condensed Matter Physics
- Advanced Memory and Neural Computing
- 2D Materials and Applications
- Ferroelectric and Piezoelectric Materials
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Ferroelectric and Negative Capacitance Devices
- Theoretical and Computational Physics
- Quantum many-body systems
- Electromagnetic wave absorption materials
- Magnetic Properties and Applications
- Transition Metal Oxide Nanomaterials
- Rare-earth and actinide compounds
- Semiconductor materials and devices
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Structural Health Monitoring Techniques
- Metallic Glasses and Amorphous Alloys
- Acoustic Wave Resonator Technologies
Nanjing University of Aeronautics and Astronautics
2023-2024
Jiangxi University of Science and Technology
2024
Peking University
2012-2023
King University
2023
University of Cambridge
2016-2021
University of Wisconsin–Madison
2020
Cornell University
2020
Collaborative Innovation Center of Quantum Matter
2014-2016
Virginia Tech
2008
We report the observation of magnetoresistance (MR) that could originate from orbital angular momentum (OAM) transport in a permalloy (Py)/oxidized Cu (Cu^{*}) heterostructure: Rashba-Edelstein magnetoresistance. The dependence MR depends on relative angle between induced OAM and magnetization similar fashion as spin Hall Despite absence elements with large spin-orbit coupling, we find sizable ratio, which is contrast to conventional requires heavy elements. Through Py thickness-dependence...
Lead-free perovskite oxide thin films prepared by alloying of titanates and materials with lower melting points are shown to have enhanced ferroelectric dielectric properties. BaTiO3 (or SrTiO3) 25% addition BiFeO3 has much improved crystalline perfection because the point giving growth kinetics. The maximum peak temperature is increased ~ 200 °C leakage currents reduced up a factor 100. loss tangent reduces 300 °C, > 14 reduction at room temperature. breakdown strength higher 3 (> 2200 kV...
Three-dimensional carbon-based structures have proven useful for tailoring material properties in structural mechanical and energy storage applications. One approach to obtain them has been by carbonization of selected metal-organic frameworks (MOFs) with catalytic metals, but this is not applicable most common MOF structures. Here, we present a strategy transform MOFs, guest inclusions high-temperature MOF-guest interactions, into complex carbon-based, diatom-like, hierarchical (named the...
Abstract Resistive switches are non-volatile memory cells based on nano-ionic redox processes that offer energy efficient device architectures and open pathways to neuromorphics cognitive computing. However, channel formation typically requires an irreversible, not well controlled electroforming process, giving difficulty independently control ionic electronic properties. The performance is also limited by the incomplete understanding of underlying mechanisms. Here, we report a novel...
This perspective considers the enormous promise of epitaxial functional transition metal oxide thin films for future applications in low power electronic and energy since they offer wide-ranging highly tunable functionalities multifunctionalities, unrivaled among other classes materials. It also great challenges that must be overcome to meet what is needed application domain. These arise from presence intrinsic defects strain effects, which lead extrinsic defects. Current conventional film...
2D magnetic materials have shown great potentials in fundamental research and spintronic devices. However, the discovered are still limited their monotonous properties cannot meet needs of practical applications. Recently, modulation magnetism attracted tremendous attention, which can enrich material family extend application prospects. Structure engineering is one most effective ways to realize tunable properties. Herein, recent progress on via structure summarized. The basic theory...
The discovery of magnetism in van der Waals (vdW) materials has established unique building blocks for the research emergent spintronic phenomena. In particular, owing to their intrinsically clean surface without dangling bonds, vdW magnets hold potential construct a superior interface that allows efficient electrical manipulation magnetism. Despite several attempts this direction, it usually requires cryogenic condition and assistance external magnetic fields, which is detrimental real...
The magnetic and microwave absorption properties of the interstitial atom modified intermetallic compound Ce2Fe17NX have been investigated. shows a planar anisotropy with saturation magnetization 1088 kA/m at room temperature. paraffin composite mass ratio 1:1 exhibits permeability μ′ = 2.7 low frequency, together reflection loss −26 dB 6.9 GHz thickness 1.5 mm −60 2.2 4.0 mm. It was found that this increases Snoek limit both high working frequency due to its c-axis field basal plane field....
In this work, we have developed a new method for manipulating and transferring up to 5 mm × 10 epitaxial oxide thin films. The involves fixing PET frame onto PMMA attachment film, enabling transfer of films lifted-off by wet chemical etching Sr3Al2O6 sacrificial layer. crystallinity, surface morphology, continuity, purity the are all preserved in process. We demonstrate applicability our three different film compositions structures thickness ~ 100 nm. Furthermore, show that using...
2D g-CNs/GeC Z-scheme heterojunctions show excellent HER and OER performance.
Ultrathin epitaxial films of ferromagnetic insulators (FMIs) with Curie temperatures near room temperature are critically needed for use in dissipationless quantum computation and spintronic devices. However, such materials extremely rare. Here, a room-temperature FMI is achieved ultrathin La0.9Ba0.1MnO3 grown on SrTiO3 substrates via an interface proximity effect. Detailed scanning transmission electron microscopy images clearly demonstrate that MnO6 octahedral rotations close to the...
Rare earth chalcogenides (RECs) with novel luminescence and magnetic properties offer fascinating opportunities for fundamental research applications. However, controllable synthesis of RECs down to the two-dimensional (2D) limit still has a great challenge. Herein, 2D wedge-shaped ferromagnetic EuS single crystals are successfully synthesized via facile molten-salt-assisted chemical vapor deposition method on sapphire. Based theoretical simulations experimental measurements, mechanisms...
We studied the effect of hydrostatic pressure on magnetic properties highly anisotropic van der Waals ferromagnetic metal ${\mathrm{Fe}}_{3}\mathrm{Ge}{\mathrm{Te}}_{2}$ (FGT) with field applied along easy axis. The paramagnetic-to-ferromagnetic transition occurs at Curie temperature ${T}_{c}=180\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ ambient pressure, and ${T}_{c}$ decreases monotonically by up to 15 K as increases 1.44 GPa, while magnetization is suppressed pressure. By using high-pressure...
In this letter, we study the origin of anomalous Hall effect (AHE) in ferrimagnetic insulator ${\mathrm{Tm}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ (TmIG)/Pt heterostructures. A monotonic decrease resistivity ($\mathrm{\ensuremath{\Delta}}{\ensuremath{\rho}}_{\mathrm{AHE}}$) with decreasing temperature is observed for TmIG/Pt, and a sign reversal $\mathrm{\ensuremath{\Delta}}{\ensuremath{\rho}}_{\mathrm{AHE}}$ occurs at around 80 K. With addition Cu interlayer, similarly decreases as...
Piezoelectric sensors are excellent damage detectors that can be applied to structural health monitoring (SHM). SHM for complex structures of aerospace vehicles working in harsh conditions is frequently required, posing challenging requirements a sensor's flexibility, radiation hardness, and high-temperature tolerance. Here, we fabricate flexible lightweight Pb(Zr0.53Ti0.47)O3 piezoelectric film on KMg3(AlSi3O10)F2 substrate via van der Waals (vdW) heteroepitaxy, endowing it with robust...
The magnetic and transport properties of La0.7Sr0.3Mn1−xCoxO3 (0 ≤ x 1) samples were systematically studied. A phase diagram was constructed according to the observed results. At two ends (x 0.3 > 0.9), exhibit conventional ferromagnetism with metallic conducting behavior, which can be interpreted in terms double exchange coupling between Mn (Co) ions. As for intermediate Co-doping region (0.3 < enter a mixed state, displays characteristics glassy states. According...
Electric field control of magnetism is a critical future technology for low-power, ultrahigh density memory. However, despite intensive research efforts, no practical material systems have emerged. Interface-coupled, composite containing ferroelectric and ferri-/ferromagnetic elements been widely explored, but they range problems, example, substrate clamping, large leakage, inability to miniaturize. In this work, through careful selection, design, nanoengineering, high-performance...
In all-oxide-based spintronic devices, large exchange bias effect with robustness against temperature fluctuation and compatibility perpendicular magnetic recording is highly desired. this work, rock-salt antiferromagnetic NiO a Néel (TN) of ∼525 K spinel ferrimagnetic NiFe2O4 high Curie temperature, TC, ≈ 790 TC > TN were chosen as compatible materials to form well-phase-separated, vertically aligned nanocomposite thin film. nanoengineered film, an blocking far above room has been achieved....
Three-dimensional (3D) strain induced in self-assembled vertically aligned nanocomposite (VAN) epitaxial films provides an unrivaled method to induce very large strains thin films. Here, by growing VAN of EuTiO3 (ETO)-Eu2O3 (EO) with different EO fractions, the vertical was systematically increased ETO, up 3.15%, and Eu-Ti-Eu bond angle along ⟨111⟩ decreased 1°, leading a weakening antiferromagnetic interactions switching from ferromagnetic behavior. Our work has shown for first time that...
Interfacial resistive switching and composition-tunable R LRS are realized in ionically conducting Na 0.5 Bi TiO 3 thin films, allowing optimised ON/OFF ratio (>10 4 ) to be achieved with low growth temperature (600 °C) thickness (<20 nm).
Combined strain + doping method is used in a VAN system to realise exemplary properties which cannot be realised plain films.
Understanding strain gradient phenomena is of paramount importance in diverse areas condensed matter physics. This effect responsible for flexoelectricity dielectric materials, and it plays a crucial role the mechanical behavior nanoscale-sized specimens. In magnetoelectric composites, which comprise piezoelectric or ferroelectric (FE) materials coupled to magnetostrictive (MS) phases, can add any uniform that present boost strength coupling. Hence, could be advantageous develop new types...
Two-dimensional arrays of magnetically coupled nanomagnets provide a mesoscopic platform for exploring collective phenomena as well realizing broad range spintronic devices. In particular, the magnetic coupling plays critical role in determining nature cooperative behavior and providing new functionalities nanomagnet-based Here, we create Ising-like which between adjacent nanomagnetic regions can be reversibly converted parallel antiparallel through solid-state ionic gating. This is achieved...