ADVANCED MATERIALS
·
2023
·Vol. 35
·期 42
·2303945
·
IF 29.4
Bing Sun,Ze Yan,Yang Cao,Shuaishuai Ding,Rongjin Li,Bo Ma,Xiang-Yang Li,Huan Yang,Wei Yin,Yamin Zhang,Qiang Wang,Xiangfeng Shao,Dezheng Yang,Desheng Xue,Hao-Li Zhang
Ferromagnetic semiconductors (FMS) enable simultaneous control of both charge and spin transport of charge carriers, and they have emerged as a class of highly desirable but rare materials for applications in spin field-effect transistors and quantum computing. Organic–inorganic hybrid perovskites with high compositional adjustability and structural versatility can offer unique benefits in the design of FMS but has not been fully explored. Here, a series of molecular FMSs based on the 2D organic–inorganic hybrid perovskite structure, namely (2ampy)CuCl 4 , (3ampy)CuCl 4 , and (4ampy)CuCl 4 , is demonstrated, which exhibits high saturation magnetization, dramatic temperature-dependent conductivity change, and tunable ferromagnetic resonance. Magnetic measurements reveal a high saturation magnetization up to 18.56 emu g −1 for (4ampy)CuCl 4 , which is one of the highest value among reported hybrid FMSs to date. Conductivity studies of the three FMSs demonstrate that the smaller adjacent octahedron distance in the 2D layer results in higher conductivity. Systematic ferromagnetic resonance investigation shows that the gyromagnetic ratio and Landau factor values are strongly dependent on the types of organic cations used. This work demonstrates that 2D hybrid perovskite materials can simultaneously possess both tunable long-range ferromagnetic ordering and semiconductivity, providing a straightforward strategy for designing and synthesizing high-performance intrinsic FMSs.
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
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xinxi Zeng,Bingcheng Luo,Han Zhang,Xiaoqing Xi,Bo Li,Ji Zhou
Electric field-induced antiferromagnets with ultrahigh resonant frequencies without current flow in insulating materials is highly desired. This paper reports the terahertz (THz) responses of Γ 4 in rare-earth orthoferrite GdFeO 3 ceramics, which were manipulated using thickening and thermal methods. As the thickness was increased, the noise was greatly reduced, and increased peak heights of both the ferromagnetic resonances and antiferromagnetic resonances were observed. For the thermal control of THz responses in GdFeO 3 , the resonant frequencies of both the ferromagnetic resonances and antiferromagnetic resonances experienced a blue shift , and their peak heights increased. The detected shifts of the responses were determined by the changes in thermodynamic potential . Moreover, macroscopic properties were collected to verify the coexistence of ferromagnetism and antiferromagnetism .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Frontiers in Physics
·
2022
·
IF 3.718
Qi Bao-tao,Guo Jun-Jie,Miao Ying-qing,Zhong Mian-zeng,Li Bo,Luo Zi-yan,Wang Xi-guang,Nie Yao-zhuang,Xia Qing-lin,Guo Guang-hua
The emergence of two-dimensional (2D) van der Waals magnetic materials has attracted enormous attention due to their novel physical phenomena and potential application in the fields of spintronics and information storage technology. Here, we systematically study the magnetic and transport properties of a van der Waals antiferromagnetic material, FeNbTe2. The magnetic and magnetoresistance measurements verified its antiferromagnetic properties, spin glass state, and negative magnetoresistance effect at lower temperatures. In addition, the measurement results of transport also show the existence of angle-dependent anisotropic magnetoresistance in a wide temperature range and anisotropic magnetoresistance inversion in a certain temperature range.
研究领域:
凝聚态物理
·
材料科学
·
自旋电子学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 99
·97055-97062
·
IF 3.289
Shan Fan,Wen Wang,Hua Ke,Jian-Cun Rao,Yu Zhou
A heterostructured Co3O4/CoFe2O4 nanocomposite material is synthetised via the solid–solid reaction of an iron precursor with urchin-like Co3O4 which was prepared via hydrothermal treatment. The coupling of Co3O4 to the hard ferrimagnet CoFe2O4 leads to reinforcement for the magnetic interaction of the interfaces and the mismatched surface spin in the Co3O4/CoFe2O4 nanocomposite is greatly reduced. The magnetic performance of the exchange-coupled anti-ferromagnetic/ferrimagnetic (AFM/FM) system is investigated with superconducting quantum interference device magnetometry. In an applied magnetic field, the low-temperature magnetization loops of the nanocomposite heterostructure exchange bias under cooling. The antiferromagnetic ordering temperature of Co3O4 is increased owing to the adjacent hard magnetic CoFe2O4 phase. The Co3O4/CoFe2O4 nanocomposite behaves as an exchange coupled system with cooperative magnetic switching.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
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
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Hui Li,Shuang Li,Yanhong Wang,Yaling Dou,Hongcheng Lu
We prepared a layered antiferromagnet KNiB 4 O 6 F 3 1 by hydrothermal synthesis, and characterized its structure and physical properties by X-ray diffraction, magnetization and specific heat measurements as well as thermal stability, FTIR and UV–vis–NIR measurements. 1 consists of layers of composition [NiB 4 O 6 F 3 ] - separated by layers of K + cations. And Ni 2+ ions are arranged in slightly distorted triangular pattern in each [NiB 4 O 6 F 3 ] - layer. The magnetic susceptibility measurements indicate no divergence between the zero-field-cooled and field-cooled curves down to 7.9 K, below which a long-range order takes place as verified by specific heat measurements. The M ( H ) curve linearly increases when the field is weak (below ∼2 T), confirming that the ground state of 1 is antiferromagnetic. At 7 T, the magnetization of 1 is 1.67 μ B which is lower than the saturation magnetization.
研究领域:
材料科学
·
固体物理
·
无机化学
·
磁学
·
晶体学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Chao Liu,Tieyan Chang,Shilei Wang,Shun Zhou,Xiaoli Wang,Chuanyan Fan,Lu Han,Feiyu Li,Huifen Ren,Shanpeng Wang,Yu-Sheng Chen,Junjie Zhang
Spins in strongly frustrated systems are of intense interest due to the emergence of intriguing quantum states including superconductivity and quantum spin liquid. Herein, we report the discovery of a cascade of phase transitions and large magnetic anisotropy in the averievite CsClCu5P2O10 single crystals. Under a zero field, CsClCu5P2O10 undergoes a first-order structural transition at around 224 K from high-temperature centrosymmetric P3̅m1 to low-temperature noncentrosymmetric P321 followed by an AFM transition at 13.6 K, and another AFM transition at ∼2.18 K. Based upon magnetic susceptibility and magnetization data with magnetic fields perpendicular to the ab plane, a phase diagram, consisting of a paramagnetic state, two AFM states, and two field-induced states including two magnetization plateaus, has been constructed. Our findings demonstrate that the quasi-2D CsClCu5P2O10 exhibits rich structural and metamagnetic transitions, and the averievite family is a fertile platform for exploring novel quantum states.
研究领域:
凝聚态物理学
·
量子磁性
·
强关联电子系统
✓ 已验证
DOI
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
危险品化学品经营许可证（带存储）