A5061997418- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- 2D Materials and Applications
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- ZnO doping and properties
- Magnetic Properties of Alloys
- Rare-earth and actinide compounds
- Magneto-Optical Properties and Applications
- Magnetic Properties and Applications
- Heusler alloys: electronic and magnetic properties
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- MXene and MAX Phase Materials
- Graphene research and applications
- Metallic Glasses and Amorphous Alloys
- Perovskite Materials and Applications
- Copper Interconnects and Reliability
- Gas Sensing Nanomaterials and Sensors
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Sensor and Energy Harvesting Materials
- Advanced Memory and Neural Computing
- Physics of Superconductivity and Magnetism
- Semiconductor materials and interfaces
- Ion-surface interactions and analysis
Beijing Normal University
2024
Peking University
2017-2023
State Key Laboratory of Artificial Microstructure and Mesoscopic Physics
2020
Collaborative Innovation Center of Quantum Matter
2020
Lanzhou University
2014
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...
van der Waals materials possess an innate layer degree of freedom and thus are excellent candidates for exploring emergent two-dimensional ferroelectricity induced by interlayer translation. However, despite being theoretically predicted, experimental realization this type is scarce at the current stage. Here, we demonstrate robust sliding in semiconducting 1T^{'}-ReS_{2} multilayers via a combined study theory experiment. Room-temperature vertical observed with number N≥2. The electric...
Calculation and experimental observation of two-dimensional multiferroic CuCrP<sub>2</sub>S<sub>6</sub>.
In 2D magnets, interlayer exchange coupling is generally weak due to the van der Waals layered structure but it still plays a vital role in stabilizing long-range magnetic ordering and determining properties. Using complementary neutron diffraction, magnetic, torque measurements, complete phase diagram of CrPS4 crystals determined. shows an antiferromagnetic ground state (A-type) formed by out-of-plane ferromagnetic monolayers with along c axis below TN = 38 K. Due small anisotropy energy...
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...
The inverse spinel oxide NiCo2O4, known for its high Curie temperature, low resistivity, and perpendicular magnetic anisotropy, is a promising candidate the development of next-generation spintronic devices. However, reducing thickness NiCo2O4 film to few atomic layers degrades room temperature electrical properties, limiting practical application. In this study, Co3O4 buffer layer introduced into ultrathin films, which significantly enhances beyond reduces while preserving strong anisotropy...
Abstract The recent realization of 2D magnetism in van der Waals (vdWs) magnets holds promise for future information technology. However, the vdWs semiconducting ferromagnets, which remain rare, are especially important developing magnetic devices with new functionalities due to possibility simultaneous control carrier charge and spin. Metal thiophosphate (MTP), a multifunctional material system that combines sought‐after properties complex oxides, is promising magnet system. Here, single...
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)...
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...
Two-dimensional nanomaterials usually have abnormal physical properties due to surface effects and large edge states. In this communication, it is demonstrated that porous hexagonal disulfide nanosheets exhibit clear room temperature ferromagnetism, where the observed ferromagnetism can be tuned by changing porosity of nanosheets. The disordered grain boundary, or defects in nanosheets, considered responsible for long-range magnetic order. This finding suggests a route facilitate design...
The effect of interface roughness ferromagnetic and antiferromagnetic layers on exchange bias is still not well understood. In this report we have investigated the surface in (111)-oriented CoO films with Fe grown top. controlled at atomic scale, over a range below \ensuremath{\sim}0.35 nm, by varying layer thickness films. It observed that both exchange-bias field $({H}_{E})$ coercivity $({H}_{C})$ extensively depend scale (111) film. An opposite dependence ${H}_{E}$ ${H}_{C}$ was found,...
The spin switching and exchange bias effect were investigated in the rare earth orthoferrite SmFeO3 composed of two antiferromagnetically coupled sublattices Sm3+ Fe3+ with canted ferromagnetic moments a temperature induced single crystal was observed. found to be modulated by exerting different magnetic fields below compensation ([Formula: see text]). This could explained as changes energy barrier related magnetization direction under fields. In meantime, coercivity displayed strong...
The magnetic phase diagram of the two-dimensional van der Waals magnet CrPS
Abstract Inverse spinel ferrimagnetic NiCo 2 O 4 (NCO) exhibits volatile physical properties due to the complex ion/valence occupation, which complicates study its intrinsic properties. In this work, robust room temperature perpendicular magnetic anisotropy (PMA) is distinctly observed in high-quality RF-sputtered NCO film down 3 uc (2.4 nm), confirmed by anomalous Hall effect. The films show a good metallic conductivity with dimensional driven metal-insulator transition. scaling relation...
Co films with thickness ranging from 20 to 160 nm have been fabricated on SiO2/Si substrates by pulsed laser deposition method (PLD). It was found that the crystal tends a structure of bulk hcp increase film thickness, and coercivity decreases increasing due change grain size. A uniaxial anisotropy in less than 120 nm, while more show an unexpected four-fold which is ascribed existence two types (directions) strongly exchange-coupled grains.
First-order reversal curve (FORC) diagram, which visualizes the variation of magnetic interaction on a field plane, has been applied to nanocrystalline Ce-Fe-B melt-spinning ribbons. The FORC diagram exhibits different vertical spread along Hu axis when is parallel or perpendicular ribbon surface. discrepancy corresponds intergranular interactions, can also be verified by Henkel plot, another method identify interactions. larger direction ascribed dominance magnetostatic interaction, while...
Abstract Phase separation in the perovskite manganites of R 1‐ x A MnO 3 (R = trivalent lanthanide cation and divalent alkaline‐earth cation) can induce novel phenomena associated with interfacial interactions. Here, occurrence phase unexpected exchange bias induced by electron beam irradiation (EBI) epitaxial LaMnO 3+δ (LMO) thin films is reported. The transformation from Mn 4+ ion to 3+ originating electron's reducibility, enhances –Mn antiferromagnetic superexchange interaction, resulting...
Perpendicular magnetic anisotropic NiCo2O4 (NCO) films show volatile physical properties due to the complicated ion occupation/valence disproportion, making it feasible be manipulated. In this work, tunable anomalous Hall effect is observed in high-quality lanthanum (La) doped NCO grown by off-axis RF sputtering technique. It reveals that longitudinal resistance (Rxx) significantly increases as growth of La doping level, while Curie temperature (TC) decreases with rising level. A universal...