A5027835383- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Shape Memory Alloy Transformations
- Magnetic Properties and Applications
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Magnetic Properties of Alloys
- Advanced Battery Materials and Technologies
- Transition Metal Oxide Nanomaterials
- Multiferroics and related materials
- Heusler alloys: electronic and magnetic properties
- Ferroelectric and Piezoelectric Materials
- Microstructure and Mechanical Properties of Steels
- ZnO doping and properties
- Conducting polymers and applications
- Advanced battery technologies research
- Graphene research and applications
- Rare-earth and actinide compounds
- Metallic Glasses and Amorphous Alloys
- Machine Learning in Materials Science
- Physics of Superconductivity and Magnetism
- Magnetism in coordination complexes
- 2D Materials and Applications
- Thermal Expansion and Ionic Conductivity
- Perovskite Materials and Applications
Xi'an Jiaotong University
2015-2024
China XD Group (China)
2018-2021
Equilibrium Research
2018
Xiangtan University
2011-2012
Helmholtz Zentrum München
2011
Abstract A spontaneous exchange bias (SEB) discovered by Wang et al . [Phys. Rev. Lett. 106 (2011) 077203.] after zero-field cooling (ZFC) has attracted recent attention due to its interesting physics. In this letter, we report a giant SEB tuned Sb-doping in Ni 50 Mn 38 Ga 12-x Sb x Heusler alloys. Such an was switched on below the blocking temperature of approximately K. The maximum H E can arrive at 2930 Oe 10 2 sample ZFC Further studies showed that attributable interaction superspin...
In this work, the magnetocaloric effect in Ni50Mn36In5Sb9 alloy was increased by more than 50% through directional solidification, and magnetic entropy change to 36.2 J kg−1 K−1 under field of 5 T. The calculated results differential scanning calorimetry curves confirmed enhanced change, which also from 29.7 40.7 K−1. Moreover, first-principles calculations show that surface formation energy along L21 (220) plane is lowest at room temperature, it easy form undergo martensitic transformation...
Hamiltonian parameters estimation is crucial in condensed matter physics, but time- and cost-consuming. High-resolution images provide detailed information of underlying extracting from them difficult due to the huge Hilbert space. Here, a protocol for based on machine learning (ML) architecture provided. It consists mapping between spin configurations small amount simulated images, applying trained ML model single unexplored experimental image estimate its key parameters, predicting...
In this work, the phenomenon of downward deviations from Curie-Weiss law is found above Curie temperature (329--458 K) in ${\mathrm{Ni}}_{2}\mathrm{MnSb}$ polycrystalline Heusler alloy, and it was confirmed by change inverse magnetic susceptibility under different fields that Griffiths phase. This abnormal can be attributed to short-range nanoferromagnetic clusters caused local lattice distortion within paramagnetic state. The ac further showed characteristics long-range disordered ordered...
We report a magnetocaloric effect with nearly zero thermal hysteresis in Heusler alloy of Ni50Mn36Sb8Ga6 around room temperature due to ferromagnetic transition martensitic state (FTMS). The refrigerant capacity value this the vicinity onset TCM can arrive at 163.8 J/kg, much higher than that first-order magnetically same alloy. Such FTMS is attributed second-order (or weak first-order) from an antiferromagnetic phase modulated 7 M orthorhombic structure 4O structure.
The determination of the nature phase transitions, especially those that involve two symmetry-breaking order parameters, is a fundamental issue in condensed matter physics. For Laves-phase rare-earth--transition-metal intermetallic compounds, their transitions both magnetic ordering and structural ordering. As typical material intermetallics, ${\mathrm{TbCo}}_{2}$ has been studied extensively for its transition around 230 K. However, understanding on this remained controversial (first/second...
Many properties of materials exhibit a heavy dependency on the domain/grain size due to change in interface density. Here, we show that bulk Ni2Mn1+xGa1−x alloys (0.4 < x 0.7), exchange bias (EB) effect appears reentrant spin glass region and magnitude (HEB) depends ferromagnetic (FM) cluster antiferromagnetic (AFM) matrix. It was found HEB first increases then deceases as FM decreases, which shows non-monotonical relationship with size, is similar grain dependence material such...
FeGa alloys are among the most promising magnetostrictive materials. How to improve magnetostriction of has been a long-term concern. In this work, trace amount Pt doped FeGa-(Fe0.83Ga0.17)100–xPtx (x = 0, 0.2, 0.4, and 0.6) was fabricated using melt-spinning technique. The magnetostriction, crystal structure, magnetocrystalline anisotropy ribbon samples were studied, revealing that conforming between growth direction easy magnetization axis, enlarged lattice parameter both contribute...
The structure of a material is an important factor in determining its physical properties. Here, we adjust the Ni50Mn37Ga13 spun ribbons by changing wheel speed to regulate exchange bias effect material. characterization results micromorphology and show that as increases, martensite lath decreases from 200 nm 50 nm, changed NM 10M mixed martensitic containing mainly NM, then where are approaching. Meanwhile, HE first increased decreased increased. optimum (HE = 7.2 kOe) occurs when 25 m∙s-1,...
The exchange bias effect is the physical cornerstone of applications, such as spin valves, ultra-high-density data storage, and magnetic tunnel junctions. This work studied room temperature by constructing a Ni50Mn38Sb12−xGax alloy system with coexisting martensitic phase structures. study found that shows non-monotonic change variation Ga composition at 300 K, an obvious appears in alloys structures 4O L10, which due to strong coupling between ferromagnetic antiferromagnetic. Further...
Abstract Galfenol (Iron-gallium) alloys have attracted significant attention as the promising magnetostrictive materials. However, as-cast Galfenols exhibit magnetostriction within range of 20–60 ppm, far below requirements high-resolution functional devices. Here, based on geometric crystallographic relationship, we propose to utilize 90°-domain switching improve by tuning crystal growth direction (CGD) along easy magnetization axis (EMA). Our first-principles calculations demonstrate that...