A5102793274- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Hydrogen Storage and Materials
- Metallic Glasses and Amorphous Alloys
- Advanced Condensed Matter Physics
- Electromagnetic wave absorption materials
- Advanced Antenna and Metasurface Technologies
- Magnetic Properties and Synthesis of Ferrites
- Geomagnetism and Paleomagnetism Studies
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Multiferroics and related materials
- ZnO doping and properties
- Metallurgical and Alloy Processes
- Magnesium Alloys: Properties and Applications
- Electronic and Structural Properties of Oxides
- Metamaterials and Metasurfaces Applications
- Aluminum Alloys Composites Properties
- Microwave Dielectric Ceramics Synthesis
- Superconducting Materials and Applications
- Inorganic Chemistry and Materials
- Thermal Expansion and Ionic Conductivity
Peking University
2016-2025
Southern University of Science and Technology
2021
Collaborative Innovation Center of Quantum Matter
2014-2020
University of Cambridge
2016
Symmetry formulated by group theory plays an essential role with respect to the laws of nature, from fundamental particles condensed matter systems. Here, combining symmetry analysis and tight-binding model calculations, we elucidate that crystallographic symmetries a vast number magnetic materials light elements, in which neglect relativistic spin-orbit coupling (SOC) is appropriate approximation, are considerably larger than conventional groups. Thus, description involves...
Here, we report the realization of epitaxial Y3Fe5O12 (YIG) thin films with perpendicular magnetic anisotropy (PMA). The are grown on substituted gadolinium gallium garnet substrate (SGGG) by pulsed laser deposition. It was found that a buffer layer Sm3Ga5O12 (SmGG) top SGGG can suppress strain relaxation, which helps induce large enough PMA to overcome shape in YIG films. reciprocal space mappings analysis reveals in-plane relaxation is suppressed, while out-of-plane exhibits strong...
In this paper, high purity τ-Mn54Al46 and Mn54−xAl46Cxalloys were successfully prepared using conventional arc-melting, melt-spinning, heat treatment process. The magnetic the structural properties examined x-ray diffraction (XRD), powder neutron measurements. A room temperature saturation magnetization of 650.5 kAm-1, coercivity 0.5 T, a maximum energy product (BH)max = 24.7 kJm-3 achieved for pure Mn54Al46 powders without carbon doping. substituted Mn54−xAl46Cx, however, reveals lower...
The grain boundary phase of Dy-free sintered Nd-Fe-B magnets is modified by using Pr68Cu32 eutectic alloy. coercivity the reaches 21 kOe, which highest value in magnets. Microstructural investigations show that a smooth and thick layer formed, content ferromagnetic elements decreases from 65 at. % to 9 %. In addition, mean size (4.5 μm) doped smaller than (6.5 original modification reduces magnetic interactions among grains hinders nucleation reversed domains, resulting enhancement.
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....
Highly anisotropic Nd13Fe79.4B7Nb0.3Ga0.3 powders from a self-organized rod-like disproportionation microstructure and room temperature magnetic properties of μ0Mr = 1.4 T, iHc 13 kOe, (BH)max 41 MGOe are obtained by optimizing hydrogenation desorption recombination (HDDR) process. Diffusion Pr68Cu32 alloy into the HDDR further increases coercivity to 18 kOe. This enhancement in is mainly attributed modification grain boundaries including decrease Fe content increase boundary thickness. The...
The crystal structure and magnetic properties of AlFe2−xMnxB2 (x = 0–0.5) compounds were investigated. With increasing Mn content, the these evolve gradually lattice parameters change continuously: Curie temperature (Tc) decreases from 312 K 0) to 220 0.5) a new phase transition ferromagnetic state (FM) spin-glass (SPG) appears upon cooling. shrinks in ab plane while it expands c direction. formation re-entrant SPG around 50 was studied via dependent ac dc magnetization as well initial...
By suppressing the growth of impurities, a melt spinning method was successfully applied to synthesis typical layered CeMn2Si2 and AlFe2B2 compounds. X-ray diffraction analysis showed that had good purity crystallized in ThCr2Si2- AlFe2B2-type structures, respectively. The differences among three -type structures were also analyzed. magnetic properties investigated by measurements electronic structure calculations. It found Fe moment reaches 1.32 μB at 5 K, which fits well with calculated...
Inverse spinel oxide NiCo2O4 is an excellent prototype to explore complex energy landscapes among exchange interactions, crystal field effects, and chemical/lattice disorders. In this work, periodic phase-separated nanocolumn films have been deposited on MgAl2O4 substrates via pulsed laser deposition. The identified as ideal inverse structure imperfect with Co vacancies at tetrahedral sites. Compared the usual single-phase film, a 20-fold enhancement of magnetoresistance (MRR = 6% 10 K 3 T)...
A novel approach is proposed wherein the hydrogenation-disproportionation-desorption-recombination (HDDR) Sm2Fe17 particles containing α-Fe were used as starting material and reacted with Sm fabricated by Sm2O3 reduction through diffusion to form new core (HDDR grain) shell (reduction structural characteristics. Further research reveals that optimizing nitridation ball-milling processes of (RD)-treated HDDR magnetic particles, it possible produce Sm2Fe17N3 a maximum energy product [(BH)max]...
The strip casting technique was first used in this work to prepare the Sm2Fe17 parent alloys. Next, Sm2Fe17N3 powders were synthesized using a gas–solid reaction of with N2. Then, anisotropic high performance prepared by surfactant-assisted grinding method gasoline solvent. It found that coercivity (iHc) ground increases decreasing average particle size (Dm), while saturation magnetization (Ms) decreases. maximum value iHc 17.5 kOe obtained at Dm = 1.3 µm. 3.1 µm show remanence ratio (Mr/Ms)...
Abstract The enhancement of coercivity in Nd-Fe-B sintered magnets modified by Pr 58 D y 10 Cu 32 alloy was investigated through scanning electron microscope（ SEM） and in-situ magneto-optic Kerr effect (MOKE) microscopy. modification treatment resulted the formation a smooth continuous weakly magnetic grain boundary layer (Nd,Pr,Dy) 2 Fe 14 B main phase with high magnetocrystalline anisotropy field, leading to an increased 23 kOe. MOKE observations revealed that dynamic evolution maze domain...
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...
The grain boundary diffusion treatment using the low melting point Pr-Cu eutectic alloy was applied to enhance coercivity of anisotropic die-upset Nd-Fe-B powders. It found that room temperature powders increases from 13 kOe 24 kOe. thickness layer increased and Fe Co content in phases decreased. modified layers may thus increase domain wall nucleation field, leading an enhancement coercivity. prevents loss continuity Nd-rich phase retains crystal texture initial grains.