A5027983192- Magnetic properties of thin films
- Magneto-Optical Properties and Applications
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Magnetic Properties and Applications
- 2D Materials and Applications
- Magnetic Properties and Synthesis of Ferrites
- Magnetic Field Sensors Techniques
- Advanced Condensed Matter Physics
- Transition Metal Oxide Nanomaterials
- Electronic and Structural Properties of Oxides
- Characterization and Applications of Magnetic Nanoparticles
- ZnO doping and properties
- Crystal Structures and Properties
- Topological Materials and Phenomena
- Copper Interconnects and Reliability
- Heusler alloys: electronic and magnetic properties
- Chalcogenide Semiconductor Thin Films
- Terahertz technology and applications
- Semiconductor materials and devices
- Inorganic Chemistry and Materials
- Surface and Thin Film Phenomena
- Plasma Diagnostics and Applications
Jiangxi Normal University
2023-2025
Zhejiang University
2025
Southern University of Science and Technology
2022-2025
Fudan University
2011-2024
Zhongshan Hospital
2024
University of California, Riverside
2016-2023
Zhejiang Yuexiu University
2022
State Key Laboratory of Surface Physics
2011-2020
State Key Laboratory of Genetic Engineering
2020
Jiangsu University
2020
Among van der Waals (vdW) layered ferromagnets, Fe3GeTe2 (FGT) is an excellent candidate material to form FGT/heavy metal heterostructures for studying the effect of spin-orbit torques (SOT). Its metallicity, strong perpendicular magnetic anisotropy built in single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility achieving ultimate SOT limit monolayer all-vdW nanodevices. The spin current generated Pt exerts...
Nickel oxide (NiO) has been studied extensively for various applications ranging from electrochemistry to solar cells [1,2]. In recent years, NiO attracted much attention as an antiferromagnetic (AF) insulator material spintronic devices [3-10]. Understanding the spin - phonon coupling in is a key its functionalization, and enabling AF spintronics' promise of ultra-high-speed low-power dissipation [11,12]. However, despite status exemplary benchmark study correlated electron systems, little...
Pure spin current, a flow of angular momentum without any companying net charge, is generated in two common ways. One makes use the Hall effect normal metals (NM) with strong spin-orbit coupling, such as Pt or Ta. The other utilizes collective motion magnetic moments waves quasi-particle excitations called magnons. A popular material for latter yttrium iron garnet, insulator (MI). Here we demonstrate NM/MI/NM trilayers that these types currents are interconvertible across interfaces,...
The magnetic properties in two-dimensional van der Waals materials depend sensitively on structure. CrI3, as an example, has been recently demonstrated to exhibit distinct depending the layer thickness and stacking order. Bulk CrI3 is ferromagnetic (FM) with a Curie temperature of 61 K rhombohedral stacking, whereas few-layer layered antiferromagnetic (AFM) phase lower ordering 45 monoclinic stacking. In this work, we use cryogenic force microscopy investigate flakes intermediate range...
The anisotropic magnetoresistance (AMR) of ${\mathrm{Cr}}_{2}{\mathrm{Ge}}_{2}{\mathrm{Te}}_{6}$ (CGT), a layered ferromagnetic insulator, is investigated under an applied hydrostatic pressure up to 2 GPa. easy-axis direction the magnetization inferred from AMR saturation feature in presence and absence pressure. At zero pressure, easy axis along $c$ or perpendicular layer. Upon application > 1 GPa, uniaxial anisotropy switches easy-plane which drives equilibrium $ab$ plane at magnetic...
We report a longitudinal spin Seebeck effect (SSE) study in epitaxially grown ${\mathrm{FeF}}_{2}(110)$ antiferromagnetic (AFM) thin films with strong uniaxial anisotropy over the temperature range of 3.8--250 K. Both magnetic-field and temperature-dependent SSE signals below N\'eel (${T}_{N}=70\text{ }\text{ }\mathrm{K}$) ${\mathrm{FeF}}_{2}$ are consistent theoretical model based on excitations AFM magnons without any net induced static magnetic moment. In addition to characteristic...
This study explores the gender differences in prevalence of mild cognitive impairment (MCI) and correlation between multiple influencing factors. The sample was comprised 1325 relatively healthy participants aged ≥ 60 years a Shanghai community-dwelling (557 males 768 females). Cognitive function assessed by Mini-Mental State Examination (MMSE). Instrumental Activities Daily Living (IADL) scale used to assess activities daily living. overall MCI 15.2%, with 10.2% men 18.9% women. In older...
Abstract Magnetic insulators (MIs) attract tremendous interest for spintronic applications due to low Gilbert damping and the absence of Ohmic loss. Spin-orbit torques (SOTs) on MIs are more intriguing than magnetic metals since SOTs cannot be transferred through direct injection electron spins. Understanding remains elusive, especially how scale with MI film thickness. Here, we observe critical role dimensionality SOT efficiency by studying layer thickness-dependent in tungsten/thulium iron...
We show tunable strain-induced perpendicular magnetic anisotropy (PMA) over a wide range of thicknesses in epitaxial ferrimagnetic insulator Eu3Fe5O12 (EuIG) and Tb3Fe5O12 (TbIG) thin films grown by pulsed-laser deposition on Gd3Ga5O12 with (001) (111) orientations, respectively. The PMA field is determined measuring the induced anomalous Hall loops Pt deposited garnet films. Due to positive magnetostriction constants, compressive in-plane strain induces as large 32.9 kOe for 4 nm thick EuIG...
Magnon polarons, a type of hybridized excitations between magnons and phonons, were first reported in yttrium iron garnet as anomalies the spin Seebeck effect responses. Here, we report an observation antiferromagnetic (AFM) magnon polarons uniaxial AFM insulator ${\mathrm{Cr}}_{2}{\mathrm{O}}_{3}$. Despite relatively higher energy than that acoustic near spin-flop transition $\ensuremath{\sim}6\text{ }\text{ }\mathrm{T}$, left-handed spectrum shifts downward to hybridize with phonons form...
We develop a low-temperature, long-wavelength theory for the interfacial spin Seebeck effect (SSE) in easy-axis antiferromagnets. The field-induced spin-flop (SF) transition of Néel order is associated with qualitative change SSE behavior: Below SF, there are two carriers opposite magnetic moments, polarized along field forming majority magnon band. Above low-energy, ferromagnetic-like mode has moment field. This results sign across which agrees recent measurements on Cr$_2$O$_3$/Pt and...
We report results of an investigation the temperature dependence magnon and phonon frequencies in NiO. A combination Brillouin - Mandelstam Raman spectroscopies allowed us to elucidate evolution spectral signatures from zone center (GHz range) second-order peaks boundary (THz range). The temperature-dependent behavior bands NiO spectrum indicates presence antiferromagnetic (AF) order fluctuation or a persistent AF state at temperatures above Neel (T=523 K). Tuning intensity excitation laser...
We studied angle-dependent magnetoresistance in $\mathrm{Pt}/{\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ bilayers at room temperature. Based on field-dependent and measurements, we show that spin Hall (SMR) exists the system temperature, although $\mathrm{F}{\mathrm{e}}_{3}{\mathrm{O}}_{4}$ layer is not a good insulator. The SMR contribution can be clearly identified for thin enough films. Moreover, does rely current direction, which different from anisotropic single-crystalline
We report a giant hysteretic spin Seebeck effect (SSE) anomaly with sign reversal at magnetic fields much stronger than the coercive field in (001)-oriented ${\mathrm{Tb}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ film. The high-field SSE enhancement reaches 4200% approximately 105 K over its weak-field value and presents nonmonotonic dependence on temperature. unexpected hysteresis of is found to be associated transition double-umbrella texture TbIG. Nearly parallel dispersion curves magnons...
Step-induced antiferromagnetic (AFM) uniaxial anisotropy and its effects on the exchange coupling have been systematically investigated in epitaxial $\mathrm{Fe}/\mathrm{CoO}$ bilayers a $\mathrm{MgO}(001)$ vicinal surface. X-ray magnetic linear dichroism measurements proved that atomic steps induced strong in-plane AFM CoO film. We found thermal activation 90\ifmmode^\circ\else\textdegree\fi{} switching of spins. The competition among step-induced anisotropy, interface coupling, generate...
The anisotropic magnetoresistance (AMR) in epitaxial $\mathrm{Pt}/\mathrm{Fe}/\mathrm{MgO}(001)$ bilayers was systematically studied as a function of Pt thickness, and strong enhancement AMR by the $\mathrm{Pt}$ layer observed. persists with 1 nm Au inserted between Fe but disappears $\mathrm{MgO}$ layer. Both spin Hall theory induced moments located at $\mathrm{Fe}/\mathrm{Pt}$ interface cannot explain observed enhancement. enhanced $\mathrm{Pt}/\mathrm{Fe}$ bilayer can be attributed to...
Van der Waals heterostructures offer great versatility to tailor unique interactions at the atomically flat interfaces between dissimilar layered materials and induce novel physical phenomena. By bringing monolayer 1 T' WTe2, a two-dimensional quantum spin Hall insulator, few-layer Cr2Ge2Te6, an insulating ferromagnet, into close proximity in heterostructure, we introduce ferromagnetic order former via interfacial exchange interaction. The ferromagnetism WTe2 manifests anomalous Nernst...
The magnetic properties of antiferromagnetic (AFM) spins were investigated using x-ray linear dichroism (XMLD) in epitaxial NiO/CoO/MgO(001) films as a function film thickness, temperature, and interface modulation. We found that the NiO AFM undergo spin reorientation transition (SRT) from in-plane orientation to out-of-plane at critical thickness. SRT can be attributed competition between anisotropy interfacial exchange coupling with CoO spins. thickness increases also strength....
30-80 nm thick yttrium iron garnet (YIG) films are grown by pulsed laser deposition on a 5 sputtered Pt atop gadolinium gallium substrate (GGG) (110). Upon post-growth rapid thermal annealing, single crystal YIG(110) emerges as if it were epitaxially GGG(110) despite the presence of intermediate film. The YIG surface shows atomic steps with root-mean-square roughness 0.12 flat terraces. Both Pt/YIG and GGG/Pt interfaces atomically sharp. resulting show clear in-plane uniaxial magnetic...
Few longitudinal studies have explored exploring the relationship between sleep duration and sarcopenia. Evidence concerning sarcopenia is limited inconsistent. The purpose of this 3-year prospective study was to explore whether associated with onset in suburb-dwelling older Chinese individuals.This a that included 754 men women aged ≥60 years (men n=327, mean age 65.24± 4.87 years) who were not initially diagnosed We defined using diagnostic algorithm recommended by Asian Working Group for...
Like air flowing over a wing, optimizing the flow of electronic charge is essential to operation nanoscale devices. Unfortunately, delicate interplay charge, spin, and heat in complex devices has precluded detailed imaging flow. Here, we report on visualization intrinsic current streamlines through yttrium iron garnet micromagnetic heterostructures. Scanning photovoltage microscopy precisely designed leads striking spatial patterns, with prominent features emerging corners narrow...
Objective: To explore the structural equation model to levels of work-related musculoskeletal disorders (WMSDs) and various risk factors in feet ankle China's occupational population, providing scientific basis for preventing WMSDs ankles. Methods: Data 73497 national epidemiological cases were selected from June 2018 December 2023 used Chinese version Electronic Questionnaire on Musculoskeletal Disorders. The adverse ergonomic their source classification standard confirmatory factor...
Osteoarthritis (OA) is a major cause of disability worldwide, with symptoms like joint pain, limited functionality, and decreased quality life, potentially leading to deformity irreversible damage. Chemical changes in tissues precede imaging alterations, making early diagnosis challenging for conventional methods X-rays. Although Raman provides detailed chemical information, it time-consuming. This paper aims achieve rapid osteoarthritis grading using self-developed system combined deep...