Journal of Magnetism and Magnetic Materials最新文献_第2页

Effect of Zn-Li-Mn grain boundary diffusion on magnetic and corrosion resistance of sintered Nd-Fe-B magnets Zn-Li-Mn晶界扩散对烧结Nd-Fe-B磁体磁性和耐蚀性的影响

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-22 DOI: 10.1016/j.jmmm.2026.173861

Tao Liu , Shilin Li , Yu Zhang , Huacheng Tong , Youhong Peng , Yaodong Wu , Suo Bai , Yuqing Xing , Da Xu , Shunshun Zhang , Yegang Wang , Lanhao Dong , Mengchao Zhang , Shengrong Zhang , Yanli Liu , Sitian Cai , Qiong Wu , Ming Yue , Haifeng Du , Jin Tang

Nd-Fe-B permanent magnets, which are essential for advanced technologies due to their superior magnetic properties, are facing growing demands for reliability as their applications diversify into critical sectors such as new energy vehicles and robotics. Corrosion resistance, critical to ensuring their functional longevity, remains a key challenge. This study addresses this by using a Zn-Li-Mn alloy for grain boundary diffusion (GBD), which enables simultaneous enhancement of coercivity and anti-corrosion performance in sintered Nd-Fe-B. After treatment, coercivity increased by 1.25 kOe with minimal remanence loss (<0.5%), while sixty-day salt immersion corrosion tests (immersed in a 3.5 wt% NaCl) showed a 70% reduction in mass loss and a corrosion potential shift from −0.80 V to −0.50 V, demonstrating significantly enhanced degradation resistance. Multiscale analysis (XRD/EPMA/TEM) revealed that multi-element co-diffusion modifies grain boundaries through dual mechanisms: coordinated modification of grain boundaries to enhance coercivity, combined with Zn/Mn segregation that forms a dense oxide film that passivates corrosion pathways. This non-rare-earth GBD strategy provides a scalable, cost-effective solution to optimize magnet durability without relying on expensive rare-earth additives, delivering transformative potential for industrial applications requiring high-performance sustainable materials.

钕铁硼永磁体因其优越的磁性而成为先进技术所必需的，随着其应用于新能源汽车和机器人等关键领域的多样化，对可靠性的需求日益增长。耐腐蚀性是确保其使用寿命的关键，但仍然是一个关键的挑战。本研究通过使用Zn-Li-Mn合金进行晶界扩散（GBD）来解决这一问题，该合金可以同时增强烧结Nd-Fe-B的矫顽力和防腐性能。处理后，矫顽力增加了1.25 kOe，残余损失最小（<0.5%），而60天的盐浸腐蚀测试（浸泡在3.5 wt%的NaCl中）显示，质量损失减少了70%，腐蚀电位从- 0.80 V变为- 0.50 V，显示出显著增强的抗降解能力。多尺度分析（XRD/EPMA/TEM）表明，多元素共扩散通过双重机制改变晶界：协同改变晶界以增强矫顽力，结合Zn/Mn偏析形成致密的氧化膜，钝化腐蚀路径。这种非稀土GBD策略提供了一种可扩展的、具有成本效益的解决方案，可以在不依赖昂贵的稀土添加剂的情况下优化磁铁的耐用性，为需要高性能可持续材料的工业应用提供了变革潜力。

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引用次数: 0

Hollow Fe3O4 magnetorheological fluid with excellent anti-sedimentation properties: Preparation, molecular dynamic simulation and characterization 具有优异抗沉降性能的空心Fe3O4磁流变流体：制备、分子动力学模拟与表征

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-22 DOI: 10.1016/j.jmmm.2026.173867

Hui Ji, Chuanjin Che, Songlin Nie, Hui Zhou, Kejie Chen

To address sedimentation issues in magnetorheological fluid (MRF) and enhance their magnetorheological performance, this study developed a hollow Fe₃O₄ MRF with superior anti-sedimentation properties. Hollow Fe₃O₄ (H-Fe₃O₄) nanoparticles (20% hollowness, 400 nm size) were surface-modified with p-aminobenzoic acid (PABA), reducing their density to 80% of solid Fe₃O₄ (S-Fe₃O₄). A dual-surfactant H-Fe₃O₄ magnetorheological fluid (H-Fe₃O₄@MRF) was prepared by dispersing the modified nanoparticles in dimethyl silicone oil (DSO) with oleic acid (OA) as a co-surfactant. The microstructure and magnetic properties of the hollow nanoparticles were characterized using transmission electron microscopy, scanning electron microscopy, and vibrating sample magnetometry. The magnetorheological (MR) behavior of H-Fe₃O₄@MRF was evaluated using an MCR301 rheometer. A molecular dynamic model was built using LAMMPS to simulate magnetic chain formation, structural evolution under shear, and the impact of nanoparticles hollowness on sedimentation stability. Simulations show that under magnetic fields, H-Fe₃O₄ nanoparticles rapidly form 3D chain structures that reorganize into lamellar patterns during shear flow, significantly improving dynamics yield strength and shear stability. Both experiments and simulations confirm that H-Fe₃O₄@MRF achieves three times better anti-sedimentation stability than conventional solid Fe₃O₄-based fluids. This new H-Fe₃O₄@MRF provides a promising solution for preventing performance degradation in applications such as pipeline vibration dampers and automotive systems.

为了解决磁流变液（MRF）中的沉降问题，提高其磁流变性能，本研究开发了一种具有优异抗沉降性能的空心Fe3O4磁流变液。采用对氨基苯甲酸（PABA）对中空Fe3O4 （H-Fe3O4）纳米颗粒进行表面修饰，使其密度降至固体Fe3O4 （S-Fe3O4）的80%。将改性纳米颗粒分散在二甲基硅油（DSO）中，油酸（OA）作为助表面活性剂，制备了双表面活性剂H-Fe3O4磁流变液（H-Fe3O4@MRF）。利用透射电子显微镜、扫描电子显微镜和振动样品磁强计对空心纳米颗粒的微观结构和磁性能进行了表征。利用MCR301流变仪对H-Fe3O4@MRF的磁流变（MR）行为进行了评价。利用LAMMPS建立了分子动力学模型，模拟了剪切作用下磁链的形成、结构演化以及纳米颗粒中空度对沉降稳定性的影响。模拟结果表明，在磁场作用下，H-Fe3O4纳米颗粒在剪切流动过程中迅速形成三维链结构，并重新排列成片层状，显著提高了动态屈服强度和剪切稳定性。实验和模拟均证实H-Fe3O4@MRF的抗沉降稳定性是传统固体fe3o4基流体的3倍。这种新的H-Fe3O4@MRF为防止管道减振器和汽车系统等应用的性能下降提供了一种有前途的解决方案。

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引用次数: 0

Perpendicularly magnetized Tb/Co multilayers featuring tilted uniaxial anisotropy: Experiments and modeling 具有倾斜单轴各向异性的垂直磁化Tb/Co多层层：实验与建模

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-22 DOI: 10.1016/j.jmmm.2026.173830

J.C. Rodriguez E. , L. Avilés-Félix , M.H. Aguirre , L.M. Rodríguez , D. Salomoni , S. Auffret , R.C. Sousa , I.L. Prejbeanu , A.E. Bruchhausen , E. De Biasi , J. Curiale

Rare earth/transition metal (RE/TM) multilayers with perpendicular magnetic anisotropy are key ingredients for the development of spintronic applications. Their compensation temperature depends on the ratio of the thicknesses of rare earth and transition metal, allowing their magnetic properties to be tuned with temperature while maintaining their anisotropy even in nanometer-scale devices. In this work, we performed a thorough structural characterization and systematically investigate the magnetic properties of a whole family of ferrimagnetic [Tb/Co]

_{\times 5}

multilayers varying the Tb thickness in the range of 0.4nm - 1.25nm. A linear dependence of the compensation temperature on the Tb layer thickness was observed. Moreover, a uniaxial anisotropy constant of

(330 \pm 30) k J / m^{3}

, which is close to the values reported by other authors, was estimated. Additionally, we proposed a model to gain a better understanding of the angular dependence of the magnetization loops and the linear dependence of the compensation temperature. We present strong evidence demonstrating that the perpendicular anisotropy must be tilted away from the perpendicular axis in order to explain the observed features, particularly the hysteresis in the in-plane loops. Our work advances the understanding of DC magnetic properties in thin RE/TM ferrimagnetic films, which has the potential to impact different fields where these materials are involved.

具有垂直磁各向异性的稀土/过渡金属（RE/TM）多层材料是发展自旋电子应用的关键因素。它们的补偿温度取决于稀土和过渡金属厚度的比例，这使得它们的磁性能随温度调整，同时即使在纳米级器件中也能保持它们的各向异性。在这项工作中，我们进行了彻底的结构表征，并系统地研究了整个家族的铁磁[Tb/Co]×5多层膜的磁性能，其Tb厚度在0.4nm - 1.25nm范围内变化。补偿温度与Tb层厚度呈线性关系。此外，估计的单轴各向异性常数为（330±30）kJ/m3，与其他作者报道的值接近。此外，我们提出了一个模型来更好地理解磁化回路的角依赖性和补偿温度的线性依赖性。我们提出了强有力的证据，证明垂直各向异性必须倾斜远离垂直轴，以解释观察到的特征，特别是面内环的滞后。我们的工作促进了对薄RE/TM铁磁薄膜直流磁性的理解，这有可能影响这些材料所涉及的不同领域。

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引用次数: 0

Spin nematic with anisotropic exchange interaction in an external magnetic 外磁场中自旋向列与各向异性交换相互作用

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-22 DOI: 10.1016/j.jmmm.2026.173863

O.A. Kosmachev, E.O. Fadeeva, Yu.A. Fridman

Using the mean field approximation, the influence of the magnetic field on the phase states and excitation spectra of a spin nematic with anisotropic bilinear exchange interaction was studied. It is established that in the case of easy-plane exchange anisotropy, depending on the ratio of exchange integrals and the external field perpendicular to the easy plane, three phase states are realized in the system: nematic collinear phase with a nonzero value of the average magnetic moment, angular ferromagnetic phase, and collinear ferromagnetic phase. It is established that in the case under consideration, the angular nematic phase is energetically unfavorable. The case of easy-axis interionic anisotropy and Ising-like bilinear exchange interaction is also considered. The spectra of elementary excitations in all phases are determined, phase diagrams are constructed.

利用平均场近似，研究了磁场对具有各向异性双线性交换作用的自旋向列相的相态和激发谱的影响。在易平面交换各向异性的情况下，根据交换积分与垂直于易平面的外场的比值，系统可以实现三种相态：平均磁矩非零的向列共线相、角铁磁相和共线铁磁相。确定了在所考虑的情况下，角向列相在能量上是不利的。还考虑了易轴离子间各向异性和伊辛类双线性交换相互作用的情况。确定了各相的初等激发谱，构造了相图。

引用次数: 0

Probing the effect of divalent transition metals (Mn, Fe, co & Ni) dopants on ZnS nanoparticles with the enhanced photocatalytic and magnetic properties 探究二价过渡金属（Mn、Fe、co和Ni）掺杂对具有增强光催化和磁性能的ZnS纳米粒子的影响

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-21 DOI: 10.1016/j.jmmm.2026.173858

Shraddha Agrawal , Jitendra Bahadur , Veerpratap Meena , Vikas Lahariya , Naveen Kumar Arkoti , Sunanda Vashisth , Aditya Tiwari , Dong-Won Kang

Present work discusses the photocatalysis ability of a series of divalent transition metals (DTMs) -doped zinc sulfide (ZnS) nanoparticles. The effect of different DTMs ions on the structural, optical properties were evaluated using various characterization techniques such as X-ray diffraction (XRD), Transmission electron microscopy (TEM), Fourier transform infrared spectrometry (FTIR), and UV–visible spectroscopy, and their photocatalysis behavior on methylene blue dye was investigated using UV irradiation. All the samples were prepared by microwave assisted synthesis route using citric acid as reducing agent. The analysis of phase and nanostructure confirmed the cubic phase of ZnS nanoparticles, with the particles exhibiting a spherical shape. The ZnS nanoparticles doped with transition metals exhibited a crystallite size that was comparatively smaller when contrasted with pure ZnS. The UV–Visible spectrums revealed that the prepared ZnS nanoparticles confirm the quantum confinement effect by a sharp peak around 415 nm. The photocatalysis degradation of an organic dye such as methylene blue (MB) by the pure and DTM doped ZnS nanoparticles shows that these act as photocatalysis under visible light irradiation. The DTM doped ZnS nanoparticles showed considerably improved photo-degradation of MB. Among these, Fe doped ZnS nanoparticles show the best photo-catalytic candidate as compared to Ni²⁺/Co²⁺/Mn²⁺ doped ZnS nanoparticles. Magnetization study showed enhanced magnetic moment in transition metal doped samples. This makes it a promising candidate for photo-catalysis for the degradation of dyes under visible light for various optoelectronic and dilute magnetic semiconductors devices.

本文讨论了一系列二价过渡金属（DTMs）掺杂的硫化锌（ZnS）纳米颗粒的光催化能力。利用x射线衍射（XRD）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）和紫外可见光谱等表征技术评价了不同dtm离子对亚甲基蓝染料的结构、光学性能的影响，并利用紫外辐射研究了它们对亚甲基蓝染料的光催化行为。所有样品均以柠檬酸为还原剂，采用微波辅助合成的方法制备。物相和纳米结构分析证实了ZnS纳米颗粒为立方相，颗粒呈球形。与纯ZnS相比，掺杂过渡金属的ZnS纳米颗粒的晶粒尺寸相对较小。紫外可见光谱表明，制备的ZnS纳米粒子在415 nm附近有一个尖峰，证实了量子约束效应。纯ZnS纳米粒子和掺杂DTM纳米粒子对有机染料亚甲基蓝（MB）的光催化降解实验表明，在可见光照射下，ZnS纳米粒子具有光催化作用。DTM掺杂的ZnS纳米粒子对MB的光降解有明显的改善，其中Fe掺杂的ZnS纳米粒子比Ni2+/Co2+/Mn2+掺杂的ZnS纳米粒子表现出最好的光催化候选物。磁化研究表明，掺杂过渡金属的样品磁矩增强。这使得它成为在可见光下用于各种光电和稀磁半导体器件的染料降解的光催化的有希望的候选者。

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引用次数: 0

Tilt-induced nonlinear spin currents in gapped two-dimensional Dirac materials 二维Dirac材料中倾斜诱导的非线性自旋电流

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.jmmm.2026.173862

Yuxuan Ma , M.Q. Pang , C.M. Wang

We propose a scheme to generate nonlinear spin currents in the tilted two-dimensional Dirac materials with out-of-plane magnetization, which are completely decoupled from both nonlinear longitudinal and Hall charge currents. These spin currents can exist within the band gap, exhibiting intrinsic quantum metric characteristics where band tilt plays a crucial role. The hexagonal warping coefficient significantly enhances these nonlinear spin currents. Furthermore, warping modifies the magnitudes of other nonlinear spin conductivity components in both conduction and valence bands, notably generating an exceptionally large off-diagonal Drude-like spin conductivity. Both the magnitude and direction of an applied in-plane magnetic field provide effective control over the amplitude and even the sign reversal of these spin conductivities. Remarkably, the in-plane magnetic field can induce an extra pure nonlinear spin current component. This work advances our understanding of quantum geometric effects in nonlinear spin transport and opens new avenues for developing dissipationless spintronic devices based on Dirac materials.

我们提出了一种在平面外磁化的二维倾斜狄拉克材料中产生非线性自旋电流的方案，该方案与非线性纵向和霍尔电荷电流完全解耦。这些自旋电流可以存在于带隙内，表现出固有的量子度量特性，其中带倾斜起着至关重要的作用。六边形翘曲系数显著增强了这些非线性自旋电流。此外，翘曲改变了传导带和价带中其他非线性自旋电导率分量的大小，特别是产生了异常大的非对角线类德鲁德自旋电导率。面内磁场的大小和方向都可以有效地控制这些自旋电导率的幅度，甚至是符号反转。值得注意的是，平面内磁场可以诱导出额外的纯非线性自旋电流分量。这项工作促进了我们对非线性自旋输运中的量子几何效应的理解，并为开发基于狄拉克材料的无耗散自旋电子器件开辟了新的途径。

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引用次数: 0

Magnetic property study of cryogenic permalloy for magnetic shielding in SHINE 低温坡莫合金在SHINE磁屏蔽中的磁性能研究

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.jmmm.2026.173836

Yongzhou He, Jian Dong

Cryogenic permalloy serves as the essential soft magnetic material for magnetic shielding of superconducting radio-frequency (SRF) cavities used in the cryomodules of advanced synchrotron radiation sources and hard X-ray free-electron lasers. Conventional permalloys exhibit severe degradation of permeability in liquid-nitrogen (LN₂) and sub-LN₂ environments, making them unsuitable for the increasingly stringent ultra-low-field requirements of SRF cavities. This work presents the design, fabrication, and systematic characterization of several composition-engineered permalloy variants developed specifically for magnetic shielding in the Shanghai High repetition-rate XFEL and Extreme light facility (SHINE) superconducting modules. Comprehensive magnetometric analyses demonstrate that the newly developed cryogenic permalloys maintain excellent soft-magnetic properties at both room temperature and 77 K, while also exhibiting a broad heat-treatment window and outstanding corrosion resistance. At LN₂ temperature, the initial permeability

μ_{i}

reaches 4

\times

10⁵–1

\times

10⁶ and the maximum permeability

μ_{m}

reaches 3

\times

10⁶–4

\times

10⁶—values that significantly surpass those of both conventional permalloys and existing cryogenic permalloys—thus fully meeting the demanding shielding-efficiency requirements of SHINE and similar SRF cavity systems.

低温坡莫合金是先进同步辐射源和硬x射线自由电子激光器低温模块中超导射频（SRF）腔磁屏蔽必不可少的软磁材料。传统的坡合金在液氮（LN2）和亚LN2环境中渗透性会严重退化，这使得它们不适合SRF腔日益严格的超低场要求。本研究介绍了几种复合工程坡莫合金变体的设计、制造和系统表征，这些变体专门用于上海高重复率XFEL和极光设备（SHINE）超导模块的磁屏蔽。综合磁强分析表明，新开发的低温坡莫合金在室温和77 K下都能保持优异的软磁性能，同时还表现出较宽的热处理窗口和优异的耐腐蚀性。在LN2温度下，初始磁导率μi达到4 × 105-1 × 106，最大磁导率μi达到3 × 106 - 4 × 106，大大超过了传统坡进合金和现有的低温坡进合金，完全满足了SHINE和类似SRF腔体系统对屏蔽效率的要求。

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引用次数: 0

Surface quality evaluation method for TA16 slender tubes via magnetic abrasive finishing based on fluid simulation and AHP-WSM approach 基于流体模拟和AHP-WSM方法的TA16细长管磁磨料精加工表面质量评价方法

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-18 DOI: 10.1016/j.jmmm.2026.173844

Haoze Ma , Jie Wang , Fan Li , Li Sun , Xiaogang Ma , Bin Han

To quantify the effect of surface quality on flow performance and achieve cost-performance co-optimization in magnetically polished TA16 slender tubes, this study proposes an integrated evaluation method combining fluid simulation with AHP-WSM. A surface roughness-flow performance mapping model was established to analyze the influence of R_a (0.29 μm to 2.79 μm) on flow velocity, pressure loss, and thermal conductivity. Results show that reducing R_a from 2.79 to 0.29 μm increases peak outlet velocity from 3.724 to 3.744 m·s⁻¹, decreases total pressure loss from 6003.38 to 5739.23 Pa, and lowers mean outlet temperature from 88.546 to 88.516 °C, with sensitivity order: pressure loss> flow velocity > temperature. Multi-objective optimization via analytic hierarchy process-weighted scoring method (AHP-WSM) identifies R_a from 0.45 μm to 0.75 μm as the Pareto-optimal range. This approach provides an economic-performance balanced decision basis for predicting pipeline performance and controlling surface quality in precision tubing.

为了量化表面质量对磁抛光TA16细长管流动性能的影响，实现成本-性能协同优化，本研究提出了流体模拟与AHP-WSM相结合的综合评价方法。建立了表面粗糙度-流动性能映射模型，分析了Ra （0.29 μm ~ 2.79 μm）对流速、压力损失和导热系数的影响。结果表明：当Ra从2.79 μm降低到0.29 μm时，峰值出口速度从3.724增加到3.744 m·s−1，总压损失从6003.38减少到5739.23 Pa，平均出口温度从88.546降低到88.516℃，其敏感性顺序为压力损失>；流速>；温度。采用层次分析法（AHP-WSM）进行多目标优化，确定Ra为0.45 μm ~ 0.75 μm的pareto最优范围。该方法为精密管道性能预测和表面质量控制提供了经济性能平衡的决策依据。

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引用次数: 0

Ferromagnetic τ-phase of MnAl system: properties, microstructure and processing methods. A review MnAl系统的铁磁τ相：性质、微观结构和加工方法。回顾

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-18 DOI: 10.1016/j.jmmm.2026.173855

A.S. Fortuna, N.M. Vazhinskii, K.S. Nechaev, M.V. Gorshenkov

Permanent magnets are essential components of many modern devices, and their economic demand is constantly growing. Magnets based on rare-earth elements exhibit the best properties. However, their production is associated with high costs and environmental risks. Therefore, alternative magnetic materials are of interest. The ferromagnetic τ-phase in the MnAl system is the most promising candidate among Mn-based ferromagnetic compounds for filling the gap between hard ferrites and rare-earth element-based magnets, both in terms of magnetic properties and cost. Numerous studies have been devoted to their investigation, but economically viable production of Mn-Al-based magnets has not yet been realized. Therefore, new approaches to processing τ-MnAl alloys that can achieve properties close to the theoretical level are required. This review analyzes the most relevant research on τ-MnAl alloys. The main patterns of formation and decomposition of the ferromagnetic τ-phase, as well as its magnetic structure and theoretical level of magnetic properties are described. The main defects of the τ-phase crystal structure and their influence on magnetic properties are considered. Information on the studied alloying systems of MnAl ferromagnetic alloys is provided. Possible methods for obtaining and processing the ferromagnetic MnAl alloys are reviewed, including rapid quenching, powder milling and compaction methods, as well as hot and cold deformation. Promising research directions are suggested based on the analysis performed.

永磁体是许多现代设备的重要组成部分，其经济需求不断增长。基于稀土元素的磁体表现出最好的性能。然而，它们的生产伴随着高成本和环境风险。因此，替代磁性材料引起了人们的兴趣。在磁性和成本方面，MnAl体系中的铁磁τ相是锰基铁磁化合物中最有希望填补硬铁氧体和稀土元素基磁体之间空白的候选者。大量的研究已经致力于他们的调查，但经济上可行的生产锰铝基磁体尚未实现。因此，需要新的方法来加工τ-MnAl合金，使其性能接近理论水平。本文对τ-MnAl合金的最新研究进行了综述。介绍了铁磁τ相的形成和分解的主要模式，以及其磁性结构和磁性能的理论水平。讨论了τ相晶体结构的主要缺陷及其对磁性能的影响。提供了所研究的MnAl铁磁合金合金体系的信息。综述了获得和加工铁磁性MnAl合金的可能方法，包括快速淬火、粉末铣削和压实方法，以及热变形和冷变形方法。在分析的基础上，提出了未来的研究方向。

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引用次数: 0

Influence of vanadium doping and rapid quenching on phase stability and magnetic properties of τ-MnAl alloys 钒掺杂和快速淬火对τ-MnAl合金相稳定性和磁性能的影响

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-18 DOI: 10.1016/j.jmmm.2026.173851

A.S. Fortuna , K.S. Nechaev , N.M. Vazhinskii , M.V. Gorshenkov , D.Yu. Karpenkov

This paper focuses on the determination of the influence of V on the stability, magnetic properties, and features of phase transitions in Mn_55-xA_42+xV₃ alloys (x = 0, 2, and 4), both in the cast and rapidly quenched states. It has been shown that vanadium decreases the stability of the ferromagnetic τ-phase. The feasibility of directly producing the τ-phase through rapid quenching has been confirmed by achieving a high proportion of the τ-phase, approximately 90 vol%, in the Mn₅₃Al₄₄V₃ as-quenched alloy. Additionally, the Curie temperature of this alloy has been determined to exhibit hysteresis during heating and subsequent cooling. Based on these findings, it was suggested that Mn₅₃Al₄₄V₃ undergoes a first-order magnetic phase transformation. Based on the experimental data, a Mn-Al-V phase diagram for alloys with a vanadium concentration of 3% and a manganese concentration of 51–55% has been proposed, and a diagram of the dependence of the phase composition in rapidly quenched ribbons on the composition of Mn_55-xA_42+xV₃ has been constructed.

本文重点研究了V对Mn55-xA42+xV3合金（x = 0、2和4）铸态和快速淬火态稳定性、磁性能和相变特征的影响。结果表明，钒降低了铁磁τ相的稳定性。通过在Mn53Al44V3淬火合金中获得较高的τ相比例（约90 vol%），证实了通过快速淬火直接产生τ相的可行性。此外，该合金的居里温度在加热和随后的冷却过程中表现出滞后。结果表明，Mn53Al44V3发生了一级磁相变。根据实验数据，提出了钒浓度为3%、锰浓度为51 ~ 55%合金的Mn-Al-V相图，并构建了快速淬火带中相组成与Mn55-xA42+xV3组成的关系图。

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引用次数: 0