Journal of Physical Chemistry C
·
2025
·
IF 3.2
Chuyi Zhang,Jiaxin Liu,Zhi Sun,Yuning Liang,Qun Xu
With the development of spintronics, ferromagnetic nanomaterials have shown unique advantages in the fields of information storage and quantum computation. The ABO3-type perovskite oxide ZnSnO3 is expected to realize d0 ferromagnetism due to its tunable crystal structure and unique electron arrangement. In this work, for the first time, the inhomogeneous oxygen octahedral structural distortion along the c-axis induced by SC CO2 can be found in 2D ZnSnO3, i.e., distortion of ZnO6 is larger than that of SnO6, and they are served as the structural basis for the generation of room-temperature ferromagnetism. In addition, combining the change in the concentration of the oxygen vacancies to ultimately realize the room-temperature d0 ferromagnetism in ZnSnO3 (Tc = 400 K, Ms = 0.1123 emu/g) can be presented. Therefore, this study establishes a new strategy for the development of transition metal-free ferromagnetic materials for the application of spintronic devices at room temperature.
研究领域:
材料科学
·
凝聚态物理
·
纳米材料
·
自旋电子学
·
功能氧化物
·
晶体结构工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 18
·5125
·
IF 3.623
Chenhua Deng,Linjie Hou,Caifeng Zhang
Recyclable, cheap, eco-friendly, and efficient adsorbent materials are very important for the removal of pollution. In this work, we report the design and implementation of ferrimagnetic-humic acid nanocomposites as superior magnetic adsorbent for heavy metals. Ferrimagnetic and ferrimagnetic-humic acid nanocomposite particles with different morphologies were prepared using the coprecipitation method and hydrothermal synthesis method, respectively. The results show that the morphology of the nanoparticles prepared by the coprecipitation method is more uniform and the size is smaller than that by the hydrothermal synthesis method. Adsorption experiments show that the ferrimagnetic-humic acid nanoparticles prepared by the coprecipitation method has high sorption capacity for cadmium, and the maximum adsorption capacity is about 763 μg/g. At the same time, magnetic technology can be used to realize the recycling of ferrimagnetic-humic acid adsorbents.Keywords:ferrimagnetic nanoparticle;heavy metal;magnetic;adsorption
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 39
·2403453
·
IF 18.5
Shengnan Li,Junyang Tan,Yujie Sun,Jiarong Liu,Huiyu Nong,Liqiong He,Yunhao Zhang,Jingwei Wang,Bilu Liu
2D magnetic materials with distinct mechanical properties are of great importance for flexible spintronics. However, synthesizing 2D magnets with atomic thickness is challenging and their mechanical properties remain largely unexplored. Here, the growth of a ferrimagnetic 2D Cr 9 Se 13 with anomalous elasticity is reported by an aged-precursor-assisted method. The obtained 2D Cr 9 Se 13 exhibits an out-of-plane ferrimagnetic order with a coercivity larger than those of conventional magnetic materials. Noteworthy, it presents decent breaking strength and a Young's modulus of 52 ± 8 GPa that is among the smallest of the 2D family. This exceptional elasticity is attributed to the unique internal voids in Cr 9 Se 13 , as evidenced by the formed edge dislocations under strain. This work not only offers a facile method to synthesize 2D magnets but also develops avenues for obtaining 2D materials with desired mechanical properties, paving the way for future flexible spintronics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 23
·19430-19436
·
IF 3.289
Jin Shen,Chunlei Wang,Shuhong Xu,Yiping Cui
Room temperature ferromagnetism is the precondition of the application of diluted magnetic semiconductors. At present, diluted magnetic nanocrystals (NCs) with room temperature ferromagnetism usually contain toxic elements, such as Cd. In this work, we report nontoxic Co:CuInS2 diluted magnetic NCs, which exhibit room temperature ferromagnetism. After growth of a ZnS shell outside Co:CuInS2 NCs, bright fluorescence can be observed, making as-prepared Co:CuInS2@ZnS NCs with both fluorescence and room temperature ferromagnetism. Besides ZnS shell encapsulation, the preparation of fluorescent–ferromagnetic bi-functional Co:CuInS2@ZnS NCs also relates to the doping amount of Co. Excess Co dopant would quench the fluorescence of the NCs whereas insufficient Co dopant could not offset the diamagnetism of the CuInS2@ZnS NCs. Only under appropriate Co doping do Co:CuInS2@ZnS NCs have both fluorescence and room temperature ferromagnetism.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 5
·1716
·
IF 3.748
Wenda Zhou,Mingyue Chen,Cailei Yuan,He Huang,Jingyan Zhang,Yanfei Wu,Xinqi Zheng,Jianxin Shen,Guyue Wang,Shouguo Wang,Baogen Shen
Exploration for the new members of air-stable 2D antiferromagnetic magnets to widen the magnetic families has drawn great attention due to its potential applications in spintronic devices. In addition to seeking the intrinsic antiferromagnets, externally introducing antiferromagnetic ordering in existing 2D materials, such as structural regulation and phase engineering, may be a promising way to modulate antiferromagnetism in the 2D limit. In this work, the in situ nitrogen doping growth of ultrathin 2D Cr2S3nanoflakes has been achieved. Antiferromagnetic ordering in 2D Cr2S3nanoflakes can be triggered by nitrogen doping induced new phase (space group P3¯1c). This work provides a new route to realize antiferromagnetism in atomically thin 2D magnets and greatly extend applications of 2D magnets in valleytronics and spintronics.Keywords:2D magnetic materials;in situ nitrogen doping;antiferromagnetism
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Shengxi Zhao,Kaiyu Xie,Ali Reza Kamali
A clean and efficient method for synthesizing Co₃Fe₇ intermetallic is reported, based on the water-asisted molten salt electrolysis employing CoFe₂O₄ electrode, which was fabricated through the thermo-mechanochemical treatment of iron and cobalt oxides. The electrolysis is conducted at the cell voltage of 1.5 V, achiving an energy consumption of 1.47 kWh/kg. Upon formation, the synthesized Co3Fe7 serves as an electrode for catalytic hydrogen production, demonstrating a current density of 91.72 mA/cm2. These performances are compared with those of electrolytic Fe (1.49 kWh/kg, 96.45 mA/cm²) and electrolytic Co (1.30 kWh/kg, 40.76 mA/cm²), both prepared under the same electrolysis potential but with different current-time profiles. The electrolytic Co3Fe7 exhibits superior ferromagnetic properties, with saturation magnetization, remanent magnetization and coercivity values of 157.0 emu/g, 4.3 emu/g and 48.9 Oe, respectively, surpassing values reported in the literature for Fe-Co alloys. The findings suggest a sustainable approach for the green synthesis of Co₃Fe₇ with enhanced ferromagnetic properties. Additionally, the electrolytic Fe and Co₃Fe₇ show promise as electrode materials for molten salt hydrogen production.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 6
·48345
·
IF 2.188
Libo Wang,Yuchang Su,Jing Zhang,Hongzhi Zhang,Qiaoqiao Dong
PVDF-CoFe 2 O 4 (CFO) thick membranes were synthesized by solvent casting method. The mixed organic solvents consist of N-methyl-2-pyrrolidone (NMP) and Ethyl acetate (EA), in which the mass ratios of NMP and EA (NMP:EA = 1:0, 1:1, and 1:2) and the temperature of solvent evaporation (range from 50 to 80 °C) has been considered. The phase structure, β-PVDF phase content, and electrical and magnetic properties of these membranes were investigated to reveal the effect of EA addition and temperature on these properties. Results manifest that all samples showed coexistence of ferroelectric and ferromagnetic properties at room temperature. EA addition makes film more compact, which may be responsible for the differences in ferromagnetic properties. Adding EA and enhancing temperature resulted in phase transition of PVDF from α and γ to β, which contributed to membranes’ ferroelectric performances. In all samples, NMP:EA = 1:2 treated at 80 °C exhibits the maximum β-phase fraction and polarization (Pmax) of 87.2% and 2.398 μC cm −2 , respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48345.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 2
·025902
·
IF 1.62
Dong Zhang,Bingjun Zhu,Shiqi Ren,Qingru Wang,Qinglin Wang,Shuhong Li,Bingyuan Zhang,Wenjun Wang
ZnAl2O4 with spinel structure has attracted more attentions due to its robust dielectric and luminescence properties. Complex cation distribution in spinel structure influences the optical and magnetic properties. Herein, we report white emission related to the defects and the magnetism assigned to Fe impurity in ZnAl2-xFexO4 (0\leqslant x\leqslant 0.6) nanocrystals fabricated by using common sol-gel method at a relatively lower temperature (700 °C) than that reported earlier. ZnAl2-xFexO4 phosphors reveal single spinel phase without impure phase. Complex cation distribution is observed in all samples, for instance, Fe and Zn in antisites, cation vacancies, and with Fe content increasing, cation distribution reveals obvious change. The band gap energy of ZnAl2-xFexO4 phosphors is reduced from 3.84 eV to 3.33 eV when the content of Fe ions (x value) increases from 0 to 0.6. Two wide band emissions assigned to the various types of shallow and deep donor/acceptor defects are observed, monitoring with the excitation wavelength of 280 nm. The Commission International de I'Eclairage (CIE) colour coordinate (x, y) of the ZnAl2-xFexO4 phosphors is found to shift from (0.3218, 0.2957) to (0.3422, 0.3122) with Fe doping in spinel lattices owing to rearrangement of defects, indicating the potential application in white-light illumination. ZnAl2-xFexO4 reveals a room ferromagnetism resulting from Fe3 + ions in spinel lattices.
研究领域:
材料科学
·
光学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Chunwei Leng,G. Yang,Quanmin Xie,Yidi Li,Jun Yang,E. Ranjith Kumar
In this work, a highly-dense cementite (Fe 3 C) was synthesized via ultra-high pressure method (UHPM). Different raw batches were prepared under identical synthetic conditions (1000 °C and 4.0 GPa for 10 min). Large amounts of Fe 3 C were produced from the raw material consisting of ∼ 6 µm iron powder with ∼ 1.5 µm graphite, illustrating that the particle size and carbon source are critical for synthesizing Fe 3 C via UHPM. The crystal size of the synthesized Fe 3 C was estimated to be approximately 19 nm by peak broadening of the X-ray diffraction pattern. Additionally, the synthesis of Fe 3 C was confirmed by electron probe microanalysis analyzer (EPMA) and X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) images showed clearly shaped grain boundaries. The excellent mechanical properties of the prepared Fe 3 C were confirmed based on an ultrasonic pulse reflecting method. According to the magnetic-hysteresis loop of the Fe 3 C, it displayed soft ferromagnetic properties.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 8
·6027-6037
·
IF 3.442
Yang Dexin,Yang Tao,Chen Yulong,Liang Yu,Liu Yan’gai
Double perovskite La 2 CoMnO 6 is an attractive spintronics with magnetoelectric, magnetodielectric, and magnetoresistive effects, which are related, at least in part, to combined structural and magnetic instabilities. To explore its magnetoelastic coupling behaviour, a conventional analysis of lattice parameter data in terms of spontaneous strain shows that the ferromagnetic ordering process is accompanied by significant volume ( e aM ) and shear ( e tM ) strains. The DC and AC magnetic data reveal the antisite defects with antiphase regions, and the ferromagnetic transition is at ~ 230 K with a small antiferromagnetic ordering at about 170 K. In addition, the Rietveld refinement of the in situ variation X-ray diffraction from 120 to 1400 K, scanning electron microscopy, and differential scanning calorimetry were used to confirm the crystal structure, microstructure, magnetic, and structural anomalies of the sample synthesised in pure oxygen atmosphere. This study, and in particular the strain analysis, of La 2 CoMnO 6 will facilitate its potential application in the field of spin electronics and thin-film engineering.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Yin Qin,Sihao Deng,Xiao-Ye Zhou,Bin Cao,Zhehan Ying,Zilin Yan,Zheng Zhong,Lunhua He,Kaikai Li,Tong-Yi Zhang
RuO2, the benchmark catalyst for the oxygen evolution reaction (OER), has traditionally been considered Pauli paramagnetic; however, recent findings have demonstrated its antiferromagnetic (AFM) properties, hinting at the opportunity to enhance RuO2’s OER performance by manipulating its magnetic traits. In this study, we successfully induced weak ferromagnetism in commercial RuO2, transitioning it from an AFM state using an electrochemical sodiation method. This process resulted in high activity, achieving an overpotential of 145 mV to reach 10 mA cm–2 and extending the service hours by more than 13 times compared to pristine RuO2 in 0.5 M H2SO4. A combination of experimental and theoretical analyses indicated that the sodiation triggers significant surface compressive stress, leading to lattice distortion and disruption of the pristine structural symmetry of RuO2. Consequently, orbital degeneration ensues, prompting individual spin-up d electrons to jump to the high-spin state. This mechanism drives the conversion from AFM to weak FM behavior for RuO2, ultimately yielding exceptional catalytic activity and stability.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
固态物理
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Material Advances
·
2024
·
IF 14.8
Yanbing Han,Jiao Fang,Han Zhang,Yiyang Sun,Yifang Yuan,Xu Chen,Mochen Jia,Xinjian Li,Han Gao,Zhifeng Shi
Chalcogenide perovskites represent a promising class of materials known for their robust stability, environmentally friendly composition, and intriguing optoelectronic characteristics. Their A-site cation is largely dependent on nonmagnetic Ca, Sr, Ba elements, showing little influences on the optoelectronic properties of chalcogenide perovskites. Here, by introducing magnetic element Eu as A-site cation, we present a comprehensive investigation into the crystal structures, band characteristics, optoelectronic features, and magnetic behaviors of EuHfS3, targeting for photovoltaics. EuHfS3 adopts a distorted perovskite structure within the Pnma space group. This structure allows for various magnetic configurations, setting foundations for multiple photovoltaic effect. The conduction band maximum primarily originates from the Hf 5d orbitals, akin to SrHfS3. Intriguingly, the presence of Eu spin-up 4f orbitals lifts the covalence band minimum, consequently narrowing the band gap of EuHfS3 (1.6 eV), which is suitable for absorber layer in p-i-n junction solar cells. Moreover, zero field cooled magnetization measurements reveal antiferromagnetic behavior in EuHfS3, indicating further spin photovoltaic effect. The integration of magnetic properties into chalcogenide perovskites, in conjunction with their inherent semiconducting attributes, holds promise for future advancements in photovoltaics and other spintronic device technologies.
研究领域:
材料科学
·
光电子学
·
磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）