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All-Altermagnetic Tunnel Junction of RuO2/NiF2/RuO2 认领 引用
1
作者 Long Zhang Guangxin Ni +1 位作者 Xuehao Wu Guoying Gao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第4期280-291,共12页
Emerging altermagnets with zero net magnetic moment and momentum-dependent spin splitting offer a promising avenue for antiferromagnetic spintronic devices;yet their integration into magnetic tunnel junctions has been... Emerging altermagnets with zero net magnetic moment and momentum-dependent spin splitting offer a promising avenue for antiferromagnetic spintronic devices;yet their integration into magnetic tunnel junctions has been hindered by reliance on ferromagnetic electrodes(introducing stray fields)or by limited functionality(non-tunable magnetoresistance without spin filtering). 展开更多
关键词 magnetic tunnel junctions NiF all altermagnetic tunnel junction spin filtering antiferromagnetic spintronic devicesyet ferromagnetic electrodes introducing antiferromagnetic spintronic devices
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Tilted and Twisted Magnetic Moments in the Kitaev Magnet α-RuCl3 认领 引用
2
作者 Xiao Wang Fengfeng Zhu +8 位作者 Markus Braden Karin Schmalzl Wolfgang Schmidt Martin Meven Erxi Feng Yinghao Zhu Alexandre Bertin Paul Steffens Yixi Su 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期161-173,共13页
The layered honeycomb magnetα-RuCl3has attracted intense scrutiny as a prime candidate for realizing the Kitaev quantum spin liquid,yet a consensus on its microscopic Hamiltonian remains elusive due to the materia... The layered honeycomb magnetα-RuCl3has attracted intense scrutiny as a prime candidate for realizing the Kitaev quantum spin liquid,yet a consensus on its microscopic Hamiltonian remains elusive due to the material's extreme sensitivity to structural details.Here,we report a comprehensive reexamination of the low-temperature crystallographic and magnetic structures of high-qualityα-RuCl3single crystals using unpolarized and polarized neutron diffraction.We confirm a sharp,first-order structural phase transition to the rhombohedral R3 space group with a pronounced thermal hysteresis.Crucially,using both spherical and longitudinal neutron polarization analysis,we determine the 3D orientation of the ordered magnetic moment without the ambiguity typically arising from domain distributions.We find that the Ru3+magnetic moments in the zigzag phase are tilted by 15.7°out of the hexagonal plane and,remarkably,exhibit an additional in-plane twist of-13.8°.This“tilted and twistedžgeometry differentiates the ground state from the previously reported models based on unpolarized neutron diffraction or resonant elastic X-ray scattering(REXS)analysis. 展开更多
关键词 kitaev quantum spin liquidyet tilted magnetic moments Kitaev magnet unpolarized polarized neutron diffractionwe microscopic hamiltonian twisted magnetic moments layered honeycomb crystallographic magnetic structures
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Continuous Stress Annealing Enables Ultralow-Loss Fe-Based Amorphous Alloys With Superior Magnetic Softness for Industrial Manufacturing 认领 引用
3
作者 Zhi-Jun Guo Jun Li +8 位作者 Jin-Hong Fu Ji-Feng Zhou Yan-Zhou Fan Xiao-Xuan Yang Ai-Na He Ya-Qiang Dong Qi-Kui Man Qiang Luo Bao-Long Shen 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期868-881,共14页
Fe-based amorphous alloys are attractive soft magnetic materials for next-generation power electronics,yet simultaneously achieving high saturation magnetic flux density(Bs),low coercivity(Hc),and low core loss under ... Fe-based amorphous alloys are attractive soft magnetic materials for next-generation power electronics,yet simultaneously achieving high saturation magnetic flux density(Bs),low coercivity(Hc),and low core loss under scalable processing conditions remains challenging.Here,a composition-stress coupling strategy combining moderate Co substitution with optimized continuous stress annealing(CSA)is proposed to enhance magnetic performance and manufacturability.The optimized Fe81.5-xCoxSi3.7B14.5C0.3(x=1)alloy is designed and exhibits outstanding properties,including low Hc of 0.92 A m-1,high Bs of 1.65 T,ultralow core loss(P10/50)of 0.031 W kg-1at 1.0 T and 50 Hz,and an effective permeability(μe)of 12,200 at 1 A m-1and 1 kHz.Compared with commercial Metglas 2605SA1,Hc and P10/50 are reduced by 46%and 40%,respectively,whereas Bs is enhanced.Multiscale experiments and micromagnetic simulations reveal that optimal Co content and CSA induce mediumrange atomic ordering and magnetoelastic coupling,generating robust uniaxial magnetic anisotropy and coherent three-dimensional magnetization.The CSA process offers a controllable,uniform,and energy-efficient route suitable for large-scale industrial production. 展开更多
关键词 continuous stress annealing Fe-based amorphous soft magnetic alloys magnetic anisotropy magnetic domain evolution
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Comparison of the anastomotic effects of combined-type and wholetype magnetic rings for gastrointestinal anastomosis in beagles 认领 引用
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作者 Miao-Miao Zhang Shu-Qin Xu +12 位作者 Hao-Xuan Wu Hong-Liang Ren Jia-Hui Wan Qiu-Ye Zhong Ming-Yu Chen Qi-Fan Zhang Rui-Min Gong Kanan Yusif-Zada Bat-Ireedui Badarch Ai-Hua Shi Yi Lyu Xue-Min Liu Xiao-Peng Yan 《World Journal of Gastroenterology》 SCIE CAS 2026年第28期101-111,共11页
BACKGROUND Magnetic compression anastomosis is a third type of anastomosis differing from suture anastomosis and stapled anastomosis.With the development of magnamosis,to meet the usage requirements for different situ... BACKGROUND Magnetic compression anastomosis is a third type of anastomosis differing from suture anastomosis and stapled anastomosis.With the development of magnamosis,to meet the usage requirements for different situations,diversified magnetic ring designs are necessary.The deformable self-assembling magnetic anastomosis ring(DSAMAR)is a new combined-type magnetic ring design.AIM To investigate the anastomosis effects of combined-type and whole-type magnetic rings for gastroenterostomy in a beagle model.METHODS Eighteen beagles were randomly assigned to three groups,in which the DSAMAR,conventional magnetic ring(CMR),and hand-sewn suturing(n=6 per group,half male and half female)were used for gastroenterostomy.The operation time,survival rate,and incidence of postoperative complications were compared among the three groups.Anastomotic specimens were obtained 1 month after operation,and the gross and histological specimens were analyzed.RESULTS The operation times for anastomosis were similar between the DSAMAR group(4.83±1.03 minutes)and CMR group(4.58±0.74 minutes),and both times were lower than that in hand-sewn group(15.25±1.41 minutes).All dogs survived except one in the hand-sewn group that died of a severe abdominal infection caused by anastomotic leakage.The average times to magnetic ring release were 9.83±2.64 days in the DSAMAR group and 10.50±2.88 days in the CMR group.In gross specimens,the anastomotic stomas of the DSAMAR group and CMR group were significantly smoother than those of the hand-sewn group,and residual sutures were observed in the handsewn group.Histological analysis showed that the mucosa of anastomosis was smooth in both magnetic anastomosis groups.CONCLUSION Gastroenterostomy was achievable using the DSAMAR in a beagle model.The combined-type magnetic rings can achieve the same anastomosis effect as whole-type magnetic rings for gastrointestinal anastomosis. 展开更多
关键词 Magnetosurgery Magnetic surgery Magnetic compression anastomosis Magnamosis Gastric bypass Magnetic ring
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Magnetic proximity-induced magnetoresistance in Pt/Tm3Fe5O12 heterostructures 认领 引用
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作者 Zhengguo Liang Kunjie Dai +3 位作者 Qiming Lv Ao Wang Jinfeng Zhang Lingfei Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第7期372-380,共9页
Thin Pt films on magnetic garnet exhibit ferromagnetic-like transport properties,which may affect the functionality of Pt in spin current detection,although direct observation of this effect has not been made.Here,we ... Thin Pt films on magnetic garnet exhibit ferromagnetic-like transport properties,which may affect the functionality of Pt in spin current detection,although direct observation of this effect has not been made.Here,we report the observation of a magnetic proximity-induced magnetoresistance(MP-MR)in Pt/Tm3Fe5O12(TmIG)heterostructures.This electrical signal is directly correlated with the itinerant ferromagnetism induced by the magnetic proximity effect(MPE)at the Pt/TmIG interface.The existence of MP-MR has been unambiguously verified through the insertion of a Cu interlayer and supported by quantitative analysis,which also enables clear differentiation from the spin Hall magnetoresistance(SMR)signal.The weak ferromagnetism observed in Pt follows the typical behavior of itinerant ferromagnetism,as predicted by the Stoner criterion.By utilizing Tm IG films with enhanced perpendicular magnetic anisotropy(PMA),we achieve amplification of the MP-MR effect.Our results demonstrate that the magnitude of MP-MR increases with decreasing temperature.Moreover,the strength of MP-MR can be substantially enhanced through improved PMA in TmIG.These findings underscore the potential of MPE-based magnetotransport phenomena for advancing spintronic device applications. 展开更多
关键词 magnetic proximity effect magnetic garnet itinerant ferromagnetism perpendicular magnetic anisotropy
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FSS-EMD-MIO:robust map-free magnetic-inertial odometry via Fibonacci sphere-sampled equivalent dipole modeling for indoor navigation 认领 引用
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作者 Yuxin Liu Wenchao Zhang +2 位作者 Lei Cao Dongyan Wei Hong Yuan 《Satellite Navigation》 SCIE EI CSCD 2026年第1期246-262,I0006,共17页
Achieving stable and high-precision positioning in environments where Global Navigation Satellite System(GNSS)is denied remains a significant challenge.Magnetic field odometry has emerged as an effective solution;howe... Achieving stable and high-precision positioning in environments where Global Navigation Satellite System(GNSS)is denied remains a significant challenge.Magnetic field odometry has emerged as an effective solution;however,existing methods mostly rely on polynomial model,which is often inadequate for accurately characterizing the complex spatial variations of indoor magnetic fields.To address this limitation,this paper proposes a robust magnetic-inertial odometry(MIO)method based on the Fibonacci sphere-sampled equivalent magnetic dipole model(FSS-EMD),denoted as FSS-EMD-MIO.The method employs Fibonacci sphere sampling to construct the FSS EMD,which can more accurately capture local magnetic field variations and magnetic anomaly distributions.Furthermore,by deriving the spatial gradient of the FSS-EMD,an analytical relationship between magnetic observations and the displacement,velocity,and attitude of the carrier is established.An Adaptive Error State Kalman Filter(AESKF)that integrates the magnetic dipole model,magnetometer array observations,and the inertial navigation system is then designed,enabling high-precision indoor autonomous positioning without reliance on prior maps.Experimental results using public datasets demonstrate that the proposed method achieves a horizontal positioning RMSE below 1.27 m,outperforming state-of-the-art methods by an average of 46%,with improvements ranging from 11 to 82%under different sensor height and motion direction.In addition,the method exhibits strong robustness across different heights and motion directions.This study provides a novel and reliable solution for infrastructure-free indoor positioning. 展开更多
关键词 Indoor positioning Magnetic field modeling Equivalent magnetic dipole Magnetic-inertial odometry Sensor fusion
The fitting of a dipolar magnetic field by a dipole model 认领 引用
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作者 ZhaoJin Rong Yong Wei +8 位作者 Fei He Lucy Klinger YanYan Yang JiaWei Gao Zhen Shi HuaPei Wang ShuHui Cai HuaFeng Qin RiXiang Zhu 《Earth and Planetary Physics》 EI CSCD 2025年第6期1125-1134,共10页
Many planets,including the Earth,possess a global dipolar magnetic field.To diagnose the interior source of the dipolar field,researchers usually adopt a dipole model consisting of six parameters to fit the observed d... Many planets,including the Earth,possess a global dipolar magnetic field.To diagnose the interior source of the dipolar field,researchers usually adopt a dipole model consisting of six parameters to fit the observed dataset of the magnetic field.However,the simultaneous fitting of these parameters often leads to multiple local optimal parameter sets.To address this fitting dilemma,Rong ZJ et al.(2021)recently developed a current loop model.This technique can successively separate and invert the loop parameters.Here,we further show how this technique can be reduced and modified to fit a dipole model.Applications of this reduced technique to the International Geomagnetic Reference Field model and the Martian crustal field model highlight its unique ability to diagnose both the planetary global dipolar field and the local crustal field anomaly,a capability that sets it apart from existing methods.The potential impact of this technique on geomagnetism and planetary magnetism is significant,given its unique ability to diagnose both the planetary global dipolar field and the local crustal field anomaly. 展开更多
关键词 geomagnetic field magnetic dipole inversion dipolar magnetic field magnetic anomaly crustal magnetic field magnetic sources eccentic dipole
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Bio-inspired magnetic soft robots with omnidirectional climbing for multifunctional biomedical applications 认领 引用 被引量：1
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作者 Ruomeng Xu Xianli Wang +2 位作者 Yuanhe Chen Lap Mou Tam Qingsong Xu 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第1期685-695,共11页
In recent years,the rising incidence of gastrointestinal(GI)cancer has triggered an urgent need for effective early intervention strategies.Traditional endoscopic techniques often cause patient discomfort,and it is di... In recent years,the rising incidence of gastrointestinal(GI)cancer has triggered an urgent need for effective early intervention strategies.Traditional endoscopic techniques often cause patient discomfort,and it is difficult to navigate deep regions of complex organ structures.This work proposes a kind of bio-inspired magnetic soft robot(BMSR)to address these challenges.The design of the BMSRs is inspired by the rolling motion of the golden wheel spider.Two six-degree-of-freedom(6-DOF)robotic arms are used,where one arm is responsible for real-time manipulation of the BMSRs,and the other is dedicated to monitoring their status.Under the actuation of an external rotating magnetic field,the BMSRs can flexibly climb on inclined surfaces at any angle,involving the inverted surface.Through the powerful output force,the BMSRs can overcome the mobility barrier induced by different human organs,including mucus,folds,and height differences of up to 8 cm.Such an exceptional mobility enables the BMSRs to deliver drugs in the targeted complex GI environment.Moreover,in combination with an endoscope,it provides real-time visual feedback for precise navigation.In vitro animal experiments validate the feasibility of BMSRs,paving a way for their usage in minimally invasive GI treatment.This work advances the potential applications of magnetic soft robots in the biomedical field. 展开更多
关键词 magnetic millirobots magnetic actuation medical robotics soft robots bio-inspired robots
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Ship Magnetic Field Modeling and Extrapolation Based on a Convolutional Neural Network 认领 引用 被引量：1
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作者 Ao Zhou Yadong Zhang +3 位作者 Wentie Yang Zuoshuai Wang Jianxun Wang Zhiwei Chen 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第2期536-549,共14页
Accurate modeling of ship magnetic fields is important for predicting their spatial distribution to improve the magnetic stealth effect of ships.This study proposes an extrapolation model for ship magnetic fields base... Accurate modeling of ship magnetic fields is important for predicting their spatial distribution to improve the magnetic stealth effect of ships.This study proposes an extrapolation model for ship magnetic fields based on genetic algorithms and convolutional neural networks(CNNs).The magnetic probe position matrix of the traditional equivalent source is utilized as input,and the three-directional components of the magnetic field measured by the probes are employed as output.The extrapolation model for ship magnetic fields is obtained through iterative training and fitting with CNNs.Variables such as the number of magnetic dipoles,the distance between magnetic dipoles,the size and quantity of convolutional kernels,batch size,learning rate,and L2 regularization coefficient are optimized to boost the accuracy of the extrapolation model for magnetic fields.The fitting accuracy of the extrapolation model for ship magnetic fields is used as the optimization objective.Based on a finite element simulation model of ship magnetic fields,the accuracy and robustness of the CNN algorithm under different magnetic field conditions are validated using the known standard depth plane,the unknown depth at 1.125 times the standard depth plane,and the unknown depth at 1.25 times the standard depth plane.Results show that,after optimization,the fitting error for the magnetic field extrapolation model based on CNN is 1.50%for the standard depth plane,1.63%for the unknown depth at 1.125 times the standard depth plane,and 2.36%for the unknown depth at 1.25 times the standard depth plane.The error remains below 5%under varying magnetic field conditions.When a random measurement error of 0%-5%is introduced for the magnetic probes,the prediction error at 1.25 times the standard depth plane is 2.30%;with a random error of 0%-10%,the prediction error is 4.95%.This approach significantly improves the accuracy and robustness of magnetic field extrapolation,which makes it an effective and feasible method for ship magnetic field modeling. 展开更多
关键词 Shipboard magnetic field Convolutional neural network Genetic algorithm Equivalent source method Magnetic field extrapolation
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Buckling and Dynamical Behaviors of Hard Magnetic Soft Pipe Conveying Fluid Under Distributed Spring Constraint 认领 引用 被引量：1
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作者 Jiachun Hu Dilong Ma +3 位作者 Runqing Cao Wei Chen Huliang Dai Lin Wang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第1期52-64,共13页
Fluid-conveying pipes have been widely used in diverse engineering fields,particularly in aerospace systems,nuclear power plants,oil transportation infrastructure,and biomedical devices.The recent advancements in 3D p... Fluid-conveying pipes have been widely used in diverse engineering fields,particularly in aerospace systems,nuclear power plants,oil transportation infrastructure,and biomedical devices.The recent advancements in 3D printing and materials science have increased research interest in the stability and vibration characteristics of slender pipes fabricated from hard magnetic soft(HMS)materials for magnetic control applications.Although several theoretical investigations have been conducted on magnetically controlled cantilevered fluid-conveying pipes,the understanding of their dynamical behavior in vascular environments remains incomplete.In this study,we investigate the buckling and dynamical behaviors of an HMS pipe under the combined effects of an applied magnetic field and nonlinear distributed spring constraints.By solving the nonlinear governing equation,natural frequencies,critical flow velocities,buckling displacements,and dynamic responses of the HMS pipe conveying fluid are obtained.The analysis reveals that the addition of distributed spring constraints leads to a substantial reduction in both buckling and dynamic displacements of the pipe system.Under constant magnetic field conditions,the pipe exhibits static deformation characteristics even when exposed to flow velocities exceeding the critical threshold for buckling instability.When subjected to an alternating magnetic field,the pipe system exhibits periodic oscillatory behavior across a wide range of flow velocities.This periodic response is characterized by displacement variations that show direct correlation with changes in the magnetic declination angle.Notably,nonlinear resonance phenomena associated with the first-mode natural frequency can occur even when the flow velocity is below the threshold for buckling instability.These results demonstrate that both magnetic field strength and declination angle offer a possible means for adjusting the stability,buckling behavior,and dynamic response of an HMS pipe. 展开更多
关键词 Hard magnetic soft material Pipe conveying fluid Distributed spring constraint Dynamical behavior Buckling instability Alternating magnetic field
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Manipulation of Topological Boundaries within a Magnetic Domain Wall 认领 引用
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作者 Zhuyang Nie Ji Chen +6 位作者 Cunlong Dong Bin He Caihua Wan Haifeng Du Xiufeng Han Yizhou Liu Guoqiang Yu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期277-292,共16页
Bloch points and transverse walls can serve as topological boundaries within a magnetic domain wall.Here,we investigate the stability and dynamics of these topological boundaries for potential spintronic applications.... Bloch points and transverse walls can serve as topological boundaries within a magnetic domain wall.Here,we investigate the stability and dynamics of these topological boundaries for potential spintronic applications.Using micromagnetic simulations,we reveal the coexistence regimes of Bloch points and transverse walls in thin films with perpendicular magnetic anisotropy.An external in-plane field enables reversible transitions between these states through boundary-mediated Bloch point nucleation and annihilation processes.Under spin-transfer torque,transverse walls exhibit transverse drift and deformation.In contrast,Bloch points move strictly along the domain wall without transverse deflection and feature a Walker breakdown threshold an order of magnitude higher than conventional domain walls.Our findings establish a device concept where binary states correspond to in-plane magnetization orientations separated by mobile topological boundaries,offering new opportunities for spintronic architectures. 展开更多
关键词 bloch points transverse walls magnetic domain wallherewe topological boundaries micromagnetic simulationswe magnetic domain walls thin films stability dynamics
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Accelerated Ordering of Cu Atoms and Synergistic Dual Anisotropy for Enhanced High-Frequency Soft Magnetic Properties in Fe-Based Alloys 认领 引用
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作者 Xiaoying Li Aina He +9 位作者 Xueling Hou Yaqiang Dong Bojun Zhang Jiawei Li Junhua Luan Weixing Xia Xingjie Jia Jie Sun Qikui Man Baogen Shen 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期904-916,共13页
The inherent trade-off between high saturation induction(Bs)and low core loss in soft magnetic materials presents a challenge in the development of high-frequency power electronics.Here,a processing approach that comb... The inherent trade-off between high saturation induction(Bs)and low core loss in soft magnetic materials presents a challenge in the development of high-frequency power electronics.Here,a processing approach that combines accelerated Cu ordering with dual magnetic anisotropy control in high-Bs Fe-based nanostructured cores is examined.This strategy results in a 26%in core loss,achieving 5.8±0.1 W kg-1 at 0.2 T and 50 kHz,together with an 8%increase in Bs.Microstructural characterization reveals that magnetic-field-driven accelerated Cu clustering promotes nanograin refinement,whereas the competition between reduced random anisotropy and weak uniaxial anisotropy optimizes domain wall behavior.These microstructural changes facilitate the formation of wide domain walls(108±5 nm)and increase domain wall multiplication under high-frequency excitation,thereby reducing hysteresis and excess loss.The combined strategy offers a feasible route for enhancing highfrequency performance of high-Bs materials,with potential application in compact and energy-effcient power conversion systems. 展开更多
关键词 magnetic anisotropy magnetic domain microstructure nanocrystalline alloy soft magnetic property
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Electronic Structure of a Correlated Antiferromagnetic Metal CrN in Epitaxial Thin Film Form 认领 引用
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作者 Rui Xu Jiexiong Sun +6 位作者 Tongrui Li Jianghao Yao Yuzhe Wang Xianglin Li Shiwu Su Donglai Feng Juan Jiang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期97-101,I0090-I0097,共5页
Chromium nitride(CrN)is a prototypical correlated antiferromagnet in which magnetic ordering is concomitant with a structural transi-tion in its bulk form,yet its low-energy electronic structure in thin films remains ... Chromium nitride(CrN)is a prototypical correlated antiferromagnet in which magnetic ordering is concomitant with a structural transi-tion in its bulk form,yet its low-energy electronic structure in thin films remains largely unexplored.Here we investigate high-quality epi-taxial CrN/MgO(001)thin films using angle-resolved photoemission spectroscopy(ARPES).Transport measurements reveal that the films remain metallic and undergo a magnetic transition without detectable structural distortion.ARPES directly resolves a shallow elec-tron-like band crossing the Fermi level(EF),forming a small Fermi surface that persists across the Néel temperature(TN).A pronounced redistribution of spectral weight is observed,which may be related to the magnetic transition.Comparison with first-principles calcula-tions shows that electronic correlations are essential to reproduce the observed band topology,establishing epitaxial CrN as a correlat-ed antiferromagnetic(AFM)metal.These results help understand the interplay between magnetism,correlations,and lattice constraints in CrN,offering an example of tailoring electronic and magnetic properties in correlated AFM thin films. 展开更多
关键词 undergo magnetic transition chromium nitride magnetic transition chromium nitride crn correlated antiferromagnetic metal angle resolved photoemission spectroscopy structural distortionarpes epitaxial thin film
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Understanding the Evolution of the Ancient Lunar Magnetic Field and Its Driving Mechanisms 认领 引用
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《Bulletin of the Chinese Academy of Sciences》 2026年第2期116-119,共4页
Dr.CAI Shuhui,researcher at the Institute of Geology and Geophysics(IGG),Chinese Academy of Sciences(CAS),has won the 2026 Tan Kah Kee Young Scientist Award in Earth Sciences,for her outstanding work on the samples re... Dr.CAI Shuhui,researcher at the Institute of Geology and Geophysics(IGG),Chinese Academy of Sciences(CAS),has won the 2026 Tan Kah Kee Young Scientist Award in Earth Sciences,for her outstanding work on the samples returned by Chang’e-5(CE-5)and Chang’e-6(CE-6)missions.She led the development of an innovative methodology for studying extremely weak magnetic records in small and fragile extraterrestrial samples,and obtained critical constraints on the mid-stage evolution of the lunar magnetic field.Her research suggests that the lunar dynamo may have strengthened again around 2.8 billion years ago and persisted,albeit weakly,until at least about 2.0 billion years ago,revising current views of the Moon’s magnetic and thermal evolution. 展开更多
关键词 studying extremely weak magnetic records extraterrestrial samples change magnetic fieldher ancient lunar magnetic field magnetic records driving mechanisms geology geophysics igg chinese
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Possible Inverse Magnetic Melting Effect in vdW-Like Kondo Lattice CeSn0.75Sb2 认领 引用
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作者 Hai Zeng Yiwei Chen +5 位作者 Zhuo Wang Shuo Zou Kangjian Luo Yang Yuan Meng Zhang Yongkang Luo 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第7期100-105,I0050-I0054,共6页
Given the intimate connection between magnetic orders and the interplay among multiple degrees of freedom in heavy-fermion systems,controlling and understanding the associated inverse melting effect is crucial for unv... Given the intimate connection between magnetic orders and the interplay among multiple degrees of freedom in heavy-fermion systems,controlling and understanding the associated inverse melting effect is crucial for unveiling novel condensed-matter states and their potential applications.Here,we report the growth of single-crystalline,quasi-two-dimensional van der Waals-like(vdW-like)Kondo lattice CeSn0.75Sb2 and its physical properties,determined by a combination of transport,magnetic,and thermodynamic measurements.We find that it hosts a fragile antiferromagnetic(AFM)order and a cluster-glass(CG)ground state,both of which are highly sensitive to external fields.Upon cooling under low in-plane magnetic fields,the AFM phase evolves into a polarized paramagnetic phase,either directly or indirectly through the intermediate CG phase.This process constitutes a possible inverse magnetic melting effect that restores the broken translational and rotational symmetries.Our work provides a rare paradigm of the inverse magnetic melting effect in vdW-like heavy-fermion materials and enriches the physics of conventional Kondo-lattice models. 展开更多
关键词 cesn sb cluster glass ground state polarized paramagnetic phase external fields fragile antiferromagnetic order translational symmetry inverse magnetic melting effect van der waals Kondo lattice
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Coordination Thermodynamic Control of Magnetic Domain Configuration Evolution toward Low‑Frequency Electromagnetic Attenuation 认领 引用
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作者 Tong Huang Dan Wang +9 位作者 Xue He Zhaobo Feng Zhiqiang Xiong Yuqi Luo Yuhui Peng Guangsheng Luo Xuliang Nie Mingyue Yuan Chongbo Liu Renchao Che 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第3期860-875,共16页
The precise tuning of magnetic nanoparticle size and magnetic domains,thereby shaping magnetic properties.However,the dynamic evolution mechanisms of magnetic domain configurations in relation to electromagnetic(EM)at... The precise tuning of magnetic nanoparticle size and magnetic domains,thereby shaping magnetic properties.However,the dynamic evolution mechanisms of magnetic domain configurations in relation to electromagnetic(EM)attenuation behavior remain poorly understood.To address this gap,a thermodynamically controlled periodic coordination strategy is proposed to achieve precise modulation of magnetic nanoparticle spacing.This approach unveils the evolution of magnetic domain configurations,progressing from individual to coupled and ultimately to crosslinked domain configurations.A unique magnetic coupling phenomenon surpasses the Snoek limit in low-frequency range,which is observed through micromagnetic simulation.The crosslinked magnetic configuration achieves effective low-frequency EM wave absorption at 3.68 GHz,encompassing nearly the entire C-band.This exceptional magnetic interaction significantly enhances radar camouflage and thermal insulation properties.Additionally,a robust gradient metamaterial design extends coverage across the full band(2–40 GHz),effectively mitigating the impact of EM pollution on human health and environment.This comprehensive study elucidates the evolution mechanisms of magnetic domain configurations,addresses gaps in dynamic magnetic modulation,and provides novel insights for the development of high-performance,low-frequency EM wave absorption materials. 展开更多
关键词 Thermodynamically controlled coordination strategy Magnetic domain configuration Low-frequency electromagnetic wave absorption Electrical/magnetic coupling Multifunction
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Enhanced lubrication mechanism and performance of Fe3O4/graphene nanolubricant under magnetic field 认领 引用
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作者 Xin Cui Peng Gong +9 位作者 Chunjin Wang Yanbin Zhang Wenqiang Zhang Zechen Zhang Zhigang Zhou Xiangguo Chen Yuewen Feng Liandi Xu Haiyuan Xin Changhe Li 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第1期295-310,共16页
To improve the inadequate Infiltration performance during the process of large arc length grinding,this study proposes a novel minimum quantity lubrication(MQL)grinding method based on magnetic traction nano-lu-bricat... To improve the inadequate Infiltration performance during the process of large arc length grinding,this study proposes a novel minimum quantity lubrication(MQL)grinding method based on magnetic traction nano-lu-brication(MTN).By utilizing magnetic fields to enhance lubricant wettability in the grinding zone,the proposed approach improves friction-reduction and anti-wear performance in high-temperature and high-friction en-vironments.A simulated grinding platform was established to investigate the tribological behavior of MTN through systematic friction and wear experiments.First,a novel Fe3O4/graphene magnetic nano-lubricant was synthesized,and the influence of magnetic field strength on its viscosity was investigated.Subsequently,an experimental validation study of the magnetic nanolubricant was conducted,comparing the properties of composite magnetic nanoparticles at different concentrations.Results showed that the friction coefficient curve of the hybrid nano-lubricant was significantly smoother,abrasion mark width was substantially reduced,and surface adhesion was markedly improved.Finally,an optimization study on the ratio of Fe3O4/GR was con-ducted to achieve optimal performance and economic efficiency.At a 2:1 Fe3O4/GR ratio,the lubricant de-monstrated the lowest average friction coefficient(0.32),the smallest wear area(6146μm2),and the best surface roughness(1.64μm).This method offers a promising strategy and experimental basis for optimizing lubrication technology in precision machining. 展开更多
关键词 MQL Magnetic assisted Magnetic nano-lubricant Tribological properties
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Tunable Correlated Chern Insulators with Giant Magnetic Anisotropy 认领 引用
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作者 Qingzhao Yao Hongyan Zhao +2 位作者 Wei Xu Hongguo Zhang Zhongqin Yang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期53-59,I0042-I0055,共7页
Achieving a high-temperature quantum anomalous Hall(QAH)effect remains an experimental challenge despite extensive research.One key limitation is the typically small magnetic anisotropy energy(MAE),generally≤1 meV,wh... Achieving a high-temperature quantum anomalous Hall(QAH)effect remains an experimental challenge despite extensive research.One key limitation is the typically small magnetic anisotropy energy(MAE),generally≤1 meV,which severely restricts the stability of long-range magnetism in two-dimensional(2D)materials.In this work,we design a monolayer LiCoTe(with ferromagnetic TC=535 K)from first-principles calculations.A giant MAE value of 40.4 meV is observed for LiCoTe by applying 3.5%strain.A topological transition(from the half metal to the QAH state with Chern number C=−1)as well as a large global QAH band gap(up to 266 meV)is achieved under certain strain.Based on a tight-binding model,an orbital multiplet tuning mechanism involving dxz/yz and dx2-y2orbitals is proposed to rationalize the giant MAE and large QAH band gap.Our findings provide a promising pathway for achieving high-temperature 2D ferromagnets and Chern insulators in real correlated materials. 展开更多
关键词 orbital multiplet tuning mechanism monolayer licote d xz yz dx y orbitals high temperature quantum anomalous hall effect small magnetic anisotropy energy mae generally giant magnetic anisotropy tunable correlated chern insulators first principles calculations
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Lithospheric magnetic variations on the Tibetan Plateau based on a 3D surface spline model,compared with strong earthquake occurrences 认领 引用
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作者 PengTao Zhang Jun Yang +3 位作者 LiLi Feng Xia Li YuHong Zhao YingFeng Ji 《Earth and Planetary Physics》 EI CSCD 2026年第1期30-43,共14页
The National Geophysical Data Center(NGDC)of the United States has collected aeromagnetic data for input into a series of geomagnetic models to improve model resolution;however,in the Tibetan Plateau region,ground-bas... The National Geophysical Data Center(NGDC)of the United States has collected aeromagnetic data for input into a series of geomagnetic models to improve model resolution;however,in the Tibetan Plateau region,ground-based observations remain insufficient to clearly reflect the characteristics of the region’s lithospheric magnetism.In this study,we evaluate the lithospheric magnetism of the Tibetan Plateau by using a 3D surface spline model based on observations from>200 newly constructed repeat stations(portable stations)to determine the spatial distribution of plateau geomagnetism,as well as its correlation with the tectonic features of the region.We analyze the relationships between M≥5 earthquakes and lithospheric magnetic field variations on the Tibetan Plateau and identify regions susceptible to strong earthquakes.We compare the geomagnetic results with those from an enhanced magnetic model(EMM2015)developed by the NGDC and provide insights into improving lithospheric magnetic field calculations in the Tibetan Plateau region.Further research reveals that these magnetic anomalies exhibit distinct differences from the magnetic-seismic correlation mechanisms observed in other tectonic settings;here,they are governed primarily by the combined effects of compressional magnetism,thermal magnetism,and deep thermal stress.This study provides new evidence of geomagnetic anomalies on the Tibetan Plateau,interprets them physically,and demonstrates their potential for identifying seismic hazard zones on the Plateau. 展开更多
关键词 Tibetan Plateau magnetic variation seismicity surface spline model enhanced magnetic model
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Regulation of morphology and magnetic properties of ZnFe2O4 assemblies via magnetic fields 认领 引用
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作者 Xian Zhang Jing Meng +3 位作者 Yeguo Sun Zhe Qu Jun Cao Yongqing Ma 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第7期797-806,共10页
ZnFe2O4 was synthesized at 200℃ via a solvothermal pathway using acetylacetonate salts of zinc and iron as raw materials in self-developed magnetic fields of varying intensities.The following phenomena were obs... ZnFe2O4 was synthesized at 200℃ via a solvothermal pathway using acetylacetonate salts of zinc and iron as raw materials in self-developed magnetic fields of varying intensities.The following phenomena were observed.During the synthesis process,applying a magnetic field causes spherical assemblies with micrometer-scale diameters to transform into coarse chain-like aggregates exhibiting a length-to-diameter ratio of approximately 4.8.As the strength of the magnetic field increases,the ZnFe2O4 particle size gradually decreases.The synthetic magnetic field causes the magnetization value of ZnFe2O4 to increase or decrease.This is due to the interaction between surface spins and bulk spins,and this interaction is regulated by the particle size.The zero-field-cooling(ZFC)curves measured under a 100-Oe(1 Oe=79.5775 A·m-1)magnetic field obey the Curie-Weiss law in the high-temperature region.The effective magnetic moments of the superparamagnetic particles obtained through fitting are µsp=2.53×104µB(ZnFe2O4 prepared under the condition without magnetic field),µsp=1.69×104µB(ZnFe2O4 prepared under the condition of two magnets),and µsp=1.85×104µB(ZnFe2O4 prepared under the condition of four magnets).The estimated magnetic particle sizes are 11.4 nm,10.6 nm,and 9.9 nm,respectively,which are larger than the corresponding sizes(8.6 nm,7.2 nm,and 6.2 nm)obtained from electron microscopy,indicating that the magnetic moments of adjacent particles tend to be parallel.This work reports a new approach that enables the preparation of magnetic particles with clean surfaces as well as tunable sizes,morphologies,and properties simply by adjusting the magnetic field strength without the need for any additives or templates,thus broadening their potential for various applications. 展开更多
关键词 assembly magnetic-field-assisted synthesis morphology magnetic properties
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