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
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
NATURE MATERIALS
·
2014
·Vol. 14
·期 3
·325-329
·
IF 36.425
Lu X. F.,Wang N. Z.,Wu H.,Wu Y. P.,Zhao D.,Zeng X. Z.,Luo X. G.,Wu T.,Bao W.,Zhang G. H.,Huang F. Q.,Huang Q. Z.,Chen X. H.
Iron selenide superconductors exhibit a number of unique characteristics that are helpful for understanding the mechanism of superconductivity in high- T c iron-based superconductors more generally. However, in the case of A x Fe 2 Se 2 (A = K, Rb, Cs), the presence of an intergrown antiferromagnetic insulating phase makes the study of the underlying physics problematic. Moreover, FeSe-based systems intercalated with alkali metal ions, NH 3 molecules or organic molecules are extremely sensitive to air, which prevents the further investigation of their physical properties. It is therefore desirable to find a stable and easily accessible FeSe-based superconductor to study its physical properties in detail. Here, we report the synthesis of an air-stable material, (Li 0.8 Fe 0.2 )OHFeSe, which remains superconducting at temperatures up to ~40 K, by means of a novel hydrothermal method. The crystal structure is unambiguously determined by a combination of X-ray and neutron powder diffraction and nuclear magnetic resonance. Moreover, antiferromagnetic order is shown to coexist with superconductivity. This synthetic route opens a path for exploring superconductivity in other related systems, and confirms the appeal of iron selenides as a platform for understanding superconductivity in iron pnictides more broadly.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Mingyang Liu,Zhongwen Ouyang,Xiaochen Liu,Jiaojiao Cao,Tongtong Xiao,Zhengcai Xia,Zhenxing Wang
Isolated large-spin Heisenberg antiferromagnetic uniform chain is quite rare. Here, we have successfully synthesized an ideal one-dimensional (1D) S = 5/2 linear-chain antiferromagnet [C2NH8]3[Fe(SO4)3], which crystallizes in a trigonal lattice with the space group R3c. A broad maximum at Tmax = 18 K is observed in the magnetic susceptibility curve. Notably, no long-range magnetic ordering is observed down to 2 K even if the material has a large Curie–Weiss temperature of θCW = −25.5 K. High-field magnetization at 2 K shows a linear increase until saturation at 30 T, and a high-field electron spin resonance (ESR) reveals the absence of a zero-field spin gap. The intrachain interaction J and interchain interaction J′ are determined. Quite a small ratio of J′/J < 2.5 × 10–3 suggests that [C2NH8]3[Fe(SO4)3] behaves as an ideal 1D uniform linear-chain antiferromagnet, in which the magnetic ordering is prevented by the extremely small interchain interaction and quantum fluctuation even for a classical spin of S = 5/2.
研究领域:
物理学
·
材料科学
·
磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Hui Yang,Cuixia Xu,Zhu Li,Min Li,Guoliang Liu
A family of Lanthanide Sulfates, namely, Ln(SO 4 )F(H 2 O) (Ln = Sm 1; Eu 2; Gd 3), have been prepared using a conventional hydrothermal method . These crystals are isomorphic and crystalize in monoclinic space group P 2(1) /n (No. 10). Their structure can be described as a ladderlike 3D lanthanide sulfate framework composed of a simple chain LnO 6 F 2 along the crystallographic b- axis further bridged via sulfate units. Ln(SO 4 )F(H 2 O) present the characteristic emission peaks of lanthanide ions, respectively. The results from magnetic measurements show three compounds display antiferromagnetic behavior between magnetic centers.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 45
·29003-29009
·
IF 4.036
Fan Sun,Zhao Liu,Jiawei Lin,Jun Deng,Zhongnan Guo,Wenxia Yuan
The magnetic semiconductor in a two-dimensional system is a major subject for both theoretical and experimental investigations. Here we report the synthesis of a new quaternary manganese chalcogenide KMnCuTe2, which shows layered structure and antiferromagnetic (AFM) semiconducting features. Single crystals of KMnCuTe2 were obtained using a self-flux method and based on single-crystal X-ray diffraction, KMnCuTe2 adopts the ThCr2Si2-type structure composed of edge-sharing tetrahedral layers separated by K+ cations. The Mn and Cu atoms randomly distribute in the centre of tetrahedral units. Attributed to the large radius of Te, KMnCuTe2 has large lattice parameters (a = 4.3115(3) Å and c = 14.9360(20) Å), leading to a long metal–metal distance (3.049 Å) in the tetrahedral layers. Based on the experiments and theoretical calculations, KMnCuTe2 exhibits a G-type AFM interaction with the transition temperature at around 225 K and an indirect semiconducting nature with the band gap of 0.95 eV. The magnetic semiconducting property of KMnCuTe2 is unique in AMnMCh2 systems (A = Li, Na, K, M = Cu, Ag and Ch = S, Se, Te), which could be associated with the large metal–metal distance. Our work not only highlights the role of metal–metal interactions on regulating the properties of ThCr2Si2-type compounds, but also provides a feasible strategy to obtain the layered magnetic semiconductor.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Jia-Peng Cao,Qianxiang Xu,Yuanhang Ren,Hehua Hui,Jining Shang,Bin Yue,Heyong He
Three Cu-based polyoxomolybdate coordination polymers, [Cu I x Cu II 1-x (mbpy)(H 2 O)][Cu II (mbpy)(H 2 O) 2 ][Na(HPO 4 )(H x PO 4 )-Mo 5 O 15 ]·5·.5H 2 O ( 1 ), Cu(mbpy)Mo 2 O 7 ( 2 ) and [(Cu II (mbpy))(Cu I y Cu II 1-y (mbpy))(H 2 O)(H y PO 4 )] 2 [H 3 PMo VI 10 Mo V 2 O 40 ]·H 2 O ( 3 ) (mbpy = 4,4′-dimethyl-2,2′-dipyridyl, 0 < x < 1, 0 < y < 1), have been hydrothermally synthesized. Single crystal X-ray diffraction analysis of compounds 1 – 3 indicates that three different types of polyoxomolybdate unit, namely Strandberg-type {P 2 Mo 5 }, dimeric {Mo 2 } and Keggin-type {PMo 12 }, are included, respectively. Compound 1 is constructed by Strandberg-type {P 2 Mo 5 } and Cu(mbpy) to form a dimeric unit. Compound 2 has a 1D nanorod-like structure connected by the simplest {Mo 2 } unit. Compound 3 is an isolated structure consisting of a Keggin-type {PMo 12 } and a {Cu 4 } unit. BVS and XPS studies demonstrate that both Cu + and Cu 2+ coexist in compounds 1 and 3 , and magnetic measurement indicates the existence of anti-ferromagnetic interactions in compounds 1 – 3 . We proposed three possible magnetic modes, namely {Cu 4 }, linear {Cu 2 } and {Cu 4 -Mo 2 }, to explain the complex magnetic behavior and try to use both magnetic study and the structure analysis to probe the Cu(I) centers in the compounds.
研究领域:
材料化学
·
磁性材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wei-Bin Wu,Yuan-Qiao Chen,Qi-Ling Xiao,Jun-Yi Ge
The Co-Te system has become a prominent field of research in recent times. CoTe 2 is confirmed to be a Dirac semimetal, while Co 2 Te is predicted to host the quantum anomalous Hall effect. Here, we have successfully grown high-quality Co 2 Te 3 single crystals using the solid-state reaction method and have characterized them using the energy dispersive X-ray spectroscopy, the X-ray diffraction and Laue diffraction. The X-ray rocking curve with a full-width at half-maximum of 0.067° shows Co 2 Te 3 single crystals have good crystalline quality and mosaicity. Co 2 Te 3 single crystals possess a hexagonal structure with the space group of P 6 3 / mmc . Resistivity measurements reveal typical metallic behavior with a transition from Non-Fermi liquid to low-temperature Landau Fermi-liquid behavior around 50 K, which can be fitted by the parallel resistance model. Magnetic measurements show no obvious anisotropy between the in-plane and out-of-plane directions with the presence of a small magnetic hysteresis at 1.8 K. Furthermore, Co 2 Te 3 single crystals undergo a magnetic phase transition around 50 K and an antiferromagnetic transition modulated by the magnetic field below 8 K.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 3
·587-592
·
IF 3.382
Chunli Jiang,Qianqian Luo,Hanmei Fu,Hechun Lin,Chunhua Luo,Jianlu Wang,Xiangjian Meng,Hui Peng,Chun-Gang Duan,Junhao Chu
Great attention has been paid to organic–inorganic hybrids in searching for single-phase multiferroics because of their flexible structure design. Here, a new [CuCl4]2− based organic–inorganic hybrid, (bix)CuCl4·H2O (bix = 1,4-bis(imidazol-1-ylmethyl)benzene), is synthesized via a simple solution method. Different from most [CuCl4]2− based organic–inorganic hybrids, tetrahedral [CuCl4]2− units in (bix)CuCl4·H2O are connected to each other through water molecules and form one dimensional chains. The coexistence of ferroelectric and antiferromagnetic ordering in (bix)CuCl4·H2O is demonstrated. Its spontaneous polarization and coercive field at room temperature are 2.03 μC cm−2 and 0.32 kV cm−1, respectively. Furthermore, (bix)CuCl4·H2O films with high quality can be easily prepared, which makes them suitable for application in device fabrication.
研究领域:
材料科学
·
凝聚态物理
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Pengcheng Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Inorganic chalcogenides capable of exhibiting many interesting functional properties, e.g. nonlinear optics, magnetism , luminescence, catalysis, have attracted considerable attention, yet coupling these properties in one compound to construct a new multifunctional chalcogenide is still rarely reported. Herein, we synthesized a novel noncentrosymmetric metal chalcogenide, NaMn 3 Ga 3 S 8 by the traditional high-temperature solid-state reaction, which can exhibit three interesting functional properties, including nonlinear optical (NLO) response, photoluminescence , and antiferromagnetism simultaneously. The single-crystal X-ray diffraction shows it crystallizes in the hexagonal space group P-6, with unit cell parameters a = 16.787 (8), c = 3.707 (3), Z = 3. In the structure, MnS 6 octahedra form a chain-like configuration that is interconnected with GaS 4 tetrahedra through vertex-, edge-sharing to construct a three-dimensional framework with the Na cations residing in the cavities. Experiments demonstrate that NaMn 3 Ga 3 S 8 shows a large second harmonic generation response at 2.09 μm about 1.6 times that of the benchmark AgGaS 2 with valuable phase-matchable features. Meanwhile, NaMn 3 Ga 3 S 8 can also exhibit antiferromagnetic characteristics with a Néel temperature of 8.6 K and luminescence emissions around 776 nm. Besides, to further analyze the structure−properties relationship, the source of multifunctional properties of the target compound is analyzed by first-principles calculation. These suggest that rational selection of structural components will be a viable approach for designing and discovering novel multifunctional metal chalcogenides .
研究领域:
材料科学
·
凝聚态物理
·
光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Longfei Ruan,Xueting Jiao,Xinyu Ge,Dapeng Cui,Zhengyi Sun,Xiao-chun Hang,Wei Shen,Zhengtao Deng
Metal ion doped semiconductor nanocrystals have attracted broad interest due to the doping ions could tailor their optical, electronic, transport, structure stability and spintronic properties. Herein, we report a novel ligand-mediated solvent-induced reprecipitation approach to synthesize stable and highly fluorescent thiol-passivated Mn-doped perovskite-related tetragonal CsPb 2 Cl 5 nanosheets (NSs). The rational tuning the chemical composition ( i.e. , Pb/Mn ratio) and controlling the crystal phase of the CsPb 2−x Mn x Cl 5 perovskite NSs have been achieved. Significantly, their crystal structure and photoluminescence properties are found to be well-reserved for over two months under ambient conditions. With the addition of Mn 2+ , the PL lifetime of CsPb 2 Cl 5 decreases, which further confirms the energy transfer of CsPb 2 Cl 5 to Mn 2+ , and energy transfer efficiency (η ET ) from CsPb 2 Cl 5 to Mn 2+ in CsPb 2−x Mn x Cl 5 NSs is as high as 54.9 %. Furthermore, benefited from the Mn 2+ doping, the antiferromagnetic fitting temperature of the NSs is −5 K, which indicates a strong antiferromagnetic coupling. This work suggests an expansive research prospect for application of metal ion doped perovskite-related materials in the field of optical, magnetic, and optoelectronics devices.
研究领域:
材料科学
·
光学
·
磁学
·
半导体物理
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Quanhui Zhang,Naikun Sun,Kang Zhao,Meiling Li,Qin Dai,Xinguo Zhao,Juan Cheng,Jiaohong Huang
Magnetic refrigeration in the liquid-helium temperature region plays a significant role in many technological fields. In this work, the crystal structure, magnetic properties, and magnetocaloric effect (MCE) of commercial Yb 2 O 3 and a series of (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds prepared by a feasible high-energy ball milling method were systematically investigated. The crystallography results demonstrate that these Yb 2 O 3 -based compounds have a cubic bixbyite structure with space group Ia 3 ¯ , and the lattice constant increases with the increase of Ho 3+ ions content. Commercial Yb 2 O 3 shows antiferromagnetic (AFM) ordering at 2.35 K, and ball-milled (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds have lower AFM ordering temperatures of RE 3+ moments of 2.30 K, 2.15 K and below 2 K for x = 0, x = 0.1 and x = 0.2 samples, respectively. Thermomagnetic behavior under high magnetic fields exhibited the existence of ferromagnetic (FM) correlation in these compounds, and a high magnetic field could induce an AFM to FM transition. The magnetization of Yb 2 O 3 increases with the increase of Ho 3+ ions content due to the increase of the effective magnetic moments. The maximum magnetic-entropy change Δ S M and relative cooling power RCP of (Yb 0.8 Ho 0.2 ) 2 O 3 are 11.1J/kg·K and 123.2 J/kg, respectively under 5 T, which are 19.4 % and 67.6 % larger than those of commercial Yb 2 O 3 . The (Yb 1-x Ho x ) 2 O 3 (x = 0, 0.1, 0.2) compounds have a large MCE under moderate magnetic field changes and there is no thermal and magnetic hysteresis, which is beneficial for application as a promising refrigerant near the liquid-helium temperature range.
研究领域:
材料科学
·
低温物理
✓ 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）