A5069250708- Magnetic properties of thin films
- Magnetic Properties and Applications
- Metallic Glasses and Amorphous Alloys
- ZnO doping and properties
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Magneto-Optical Properties and Applications
- Copper Interconnects and Reliability
- 2D Materials and Applications
- Quantum and electron transport phenomena
- Magnetic Properties and Synthesis of Ferrites
- Advanced Memory and Neural Computing
- Microwave and Dielectric Measurement Techniques
- Electromagnetic wave absorption materials
- Physics of Superconductivity and Magnetism
- Electrodeposition and Electroless Coatings
- Semiconductor materials and interfaces
- Heusler alloys: electronic and magnetic properties
- Advancements in Battery Materials
- Advanced Condensed Matter Physics
- Graphene research and applications
- Magnetic Properties of Alloys
- Theoretical and Computational Physics
- Topological Materials and Phenomena
- Characterization and Applications of Magnetic Nanoparticles
Lanzhou University
2013-2024
University of Chinese Academy of Sciences
2019-2023
Institute of Physics
2019-2023
Chinese Academy of Sciences
2019-2023
Songshan Lake Materials Laboratory
2019-2023
The recent discovery of ferromagnetism in two-dimensional (2D) van der Waals (vdW) materials holds promises for spintronic devices with exceptional properties. However, to use 2D vdW magnets building nanodevices such as magnetic memories, key challenges remain terms effectively switching the magnetization from one state other electrically. Here, we devise a bilayer structure Fe3GeTe2/Pt, which few-layered Fe3GeTe2 can be switched by spin-orbit torques (SOTs) originated current flowing Pt...
Manipulation of magnetization by electric-current-induced spin-orbit torque (SOT) is great importance for spintronic applications because its merits in energy-efficient and high-speed operation. An ideal material SOT should possess high charge-spin conversion efficiency electrical conductivity. Recently, transition metal dichalcogenides (TMDs) emerge as intriguing platforms study their controllability coupling, conductivity, energy band topology. Although TMDs show potentials applications,...
Room temperature magnetic skyrmions in multilayers are considered as information carriers for future spintronic applications. Currently, a detailed understanding of the skyrmion stabilization mechanisms is still lacking these systems. To gain more insight, it first and foremost essential to determine full real-space spin configuration. Here, two advanced X-ray techniques applied, based on circular dichroism, investigate textures [Ta/CoFeB/MgO]n multilayers. First, by using ptychography,...
Abstract Width-controlled M-type hexagonal SrFe 12 O 19 nanoribbons were synthesized for the first time via polyvinylpyrrolidone (PVP) sol assisted electrospinning followed by heat treatment in air and their chemical composition, microstructure magnetic performance investigated. Results demonstrated that as-obtained well-crystallized with high purity. Each nanoribbon was self-assembled abundant single-domain nanoparticles consecutive on structure uniform width. PVP spinning solution played a...
Magnetostrictive FeGa thin films were deposited on the bowed flexible polyethylene terephthalate (PET) substrates, which fixed convex mold. A compressive stress was induced in when PET substrates shaped from to flat. Due effect of magnetostriction, exhibit an obvious in-plane uniaxial magnetic anisotropy could be enhanced by increasing applied pre-strains during growth. Consequently, ferromagnetic resonance frequency significantly increased, but corresponding initial permeability decreased....
A new analytical method has been proposed by utilizing an electromagnetic induction principle with a short-circuited microstrip line jig and the complex permeability spectra can be calculated without known reference sample. The using exhibit higher sensitivity wider frequency band than coplanar waveguide pick-up coil. Two magnetic thin films having good in-plane uniaxial anisotropy are measured method. results show typical in agreement theoretical results. values verified comparing initial...
Abstract Complex oxides with 4d/5d transition metal ions, e.g., SrRuO 3 , usually possess strong spin–orbit coupling, which potentially leads to efficient charge‐spin interconversion. As the electrical transport property of can be readily tuned via structure control, it serves as a platform for studying manipulation Here, factor twenty enhancement torque (SOT) efficiency strain engineering in /Ni 81 Fe 19 bilayer is reported. The results show that an orthorhombic higher SOT than tetragonal...
Abstract The discovery of magnetic order in atomically-thin van der Waals materials has strengthened the alliance between spintronics and two-dimensional materials. An important use spintronic devices, which not yet been demonstrated, would be for coherent spin injection via spin-pumping effect. Here, we report pumping from Cr 2 Ge Te 6 into Pt or W detection current by inverse Hall magnetization dynamics hybrid /Pt system are measured, a damping constant ~ 4–10 × 10 −4 is obtained thick...
Being capable of gathering advanced properties SrTiO<sub>3</sub> and NiFe<sub>2</sub>O<sub>4</sub>, hierarchical SrTiO<sub>3</sub>/NiFe<sub>2</sub>O<sub>4</sub> composite nanostructures have been synthesized toward enhanced photocatalytic activity.
Spin current generated in a ferromagnetic metal (FM) can be divided into two types. While one is magnetization dependent and induced by the well-known anomalous Hall effect, other magnetization-independent spin effect which similar to that paramagnetic heavy (HM). Here, we study YIG/FM (NiFe CoFeB) via spin-torque resonance (ST-FMR) technique. Our experiments reveal existence of current. Although there strong exchange interaction FM, does not dephase as quickly expected. Furthermore,...
The emergence of magnetic skyrmions, topological spin textures, has aroused tremendous interest in studying the rich physics related to their topology. While skyrmions promise high-density and energy-efficient memory devices for information technology, manifestation nontrivial topology through single ordered disordered skyrmion lattices could also give rise many fascinating physical phenomena, such as chiral magnon glass states. Therefore, generating at designated locations on a large scale,...
Abstract Synthetic antiferromagnets (SAFs), formed through an interlayer antiferromagnetic exchange coupling of ferromagnetic layers, exhibit intriguing potential in next‐generation spintronic devices due to the zero net magnetization and high thermal stability. Compared ferromagnets that are conventionally widely employed, SAFs expected significantly improve data density stability suppression stray field. Thus far, it has been well established spin‐orbit torque (SOT) switching SAF requires...
Abstract Magnetic skyrmions are topologically protected noncollinear spin textures, which regarded as promising information carriers for next‐generation spintronic devices due to their small size and the low current density needed drive motion. Stability of in zero external magnetic field is important promoting fundamental studies device applications. A few zero‐field skyrmion‐hosting materials have been developed, but none them successfully integrated into a tunnel junction (MTJ), crucial...
Characterization of spin-orbit torques (SOTs) in the perpendicular magnetic anisotropy (PMA) system is great importance for fundamental studies and technological applications spintronic devices. Here, we report a spin Hall magnetoresistance (SMR) based spin-torque ferromagnetic resonance (ST FMR) study SOT efficiency perpendicularly magnetized $\mathrm{W}$/${\mathrm{Co}}_{40}{\mathrm{Fe}}_{40}{\mathrm{B}}_{20}$/$\mathrm{Mg}\mathrm{O}$ structures. A full analysis ST FMR spectrum developed PMA...
Iridium ($\mathrm{Ir}$) is a 5d heavy metal with strong spin-orbit coupling (SOC), which introduces various intriguing phenomena when interacting ferromagnetic layer. In this study, we utilize $\mathrm{Ir}$ as an insertion layer in $\mathrm{W}/\mathrm{Ir}({t}_{\mathrm{Ir}})/{\mathrm{Co}}_{20}{\mathrm{Fe}}_{60}{\mathrm{B}}_{20}/\mathrm{Mg}\mathrm{O}$ heterostructures to tune SOC and study its influence on the torque (SOT), perpendicular magnetic anisotropy (PMA), Dzyaloshinskii-Moriya...
Abstract We investigated the magnetic anisotropy and high-frequency property of flexible Fe 60 Co 26 Ta 14 (FeCoTa) thin films obtained by oblique sputtering onto a wrinkled surface. The sinuously topography is produced growing layer on pre-strained polydimethylsiloxane (PDMS) membrane. Due to enhanced effect shadowing, deposition FeCoTa gives rise shift wrinkle peak towards incident atomic flux. With increasing PDMS pre-strain or angle, both uniaxial ferromagnetic resonance frequency are...
An investigation of the annealing influence on stripe domains structure in Permalloy films has been performed by comparing static and dynamic magnetic properties. increasing exchange stiffness constant A ex is found when temperature rises. The force microscopy images show that width domain increases with increase temperature, considered to be most prominent reason. perpendicular standing spin-wave model used deduce from evolution resonance frequencies, nearly twice 7.2 × 10−7 ergs cm−1 for...
The recent discovery of ferromagnetism in two-dimensional (2D) van der Waals (vdW) materials holds promises for novel spintronic devices with exceptional performances. However, order to utilize 2D vdW magnets building nanodevices such as magnetic memories, key challenges remain terms effectively switching the magnetization from one state other electrically. Here, we devise a bilayer structure Fe3GeTe2/Pt, which few-layered Fe3GeTe2 can be switched by spin-orbit torques (SOTs) originated...
A short-circuited coplanar waveguide jig was proposed due to its simple structure and potential applications, which successfully used measure the permeability spectra of magnetic thin film. The result obtained from (CPW) exhibits typical ferromagnetic resonance spectra, can be well fitted by a trade-off equation because measured have bit asymmetry special intensity distribution microwave field in CPW. In order confirm availability shorted CPW jig, previous microstrip line same sample....
FeCoCd thin films with 500 nm thickness are directly prepared through electrodeposition in the sulphate bath which glycine and citric acid were added as complex agents. The composition, structure, magnetic of investigated a function Cd2+ concentration, cathode current density, deposition temperature. A wonderful soft film was its coercivity easy axis hard 5 Oe 4 Oe, respectively. natural resonance frequency is about 3.0 GHz, imply that potential candidate for high applications.
Charge-to-spin conversion is crucial for the application of emerging spintronic devices. A two-dimensional electron gas (2DEG) at a complex oxide interface usually possesses strong Rashba spin-orbit coupling, and spin-momentum locking offers great possibility efficient charge-to-spin through Rashba-Edelstein effect. Here, we report fabrication metallic 2DEGs in \ensuremath{\gamma}-${\mathrm{Al}}_{2}{\mathrm{O}}_{3}/{\mathrm{KTaO}}_{3}$ spinel/perovskite heterostructures investigate...
This work reports the enhancement of damping-like and field-like spin–orbit torque (SOT) efficiencies interfacial spin transparency (Tin) in Py/NiO/Pt heterostructure. The SOT Tin are characterized by combining spin–torque ferromagnetic resonance (ST-FMR) spin-pumping (SP) techniques. inevitable inverse Hall voltage contamination induced SP ST-FMR spectrum is extracted subtracted additional measurements, which allows obtaining accurate Tin. vary with NiO insertion layer thickness, a result...