Journal of Magnetism and Magnetic Materials最新文献

Tailoring room-temperature ferromagnetism and magneto-transport in cuCr co-doped ZnS nanoparticles cuCr共掺杂ZnS纳米颗粒的室温铁磁性和磁输运裁剪

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-29 DOI: 10.1016/j.jmmm.2026.173879

Prayas Chandra Patel , Yogendra Lal Verma , Swati Raman , Aditya Narayan Upadhyay

Transition metal co-doping has emerged as an effective strategy to tailor the magnetic and electronic properties of wide-bandgap semiconductors for spintronic applications. In this work, CuCr co-doped ZnS nanoparticles were synthesized via a simple wet-chemical precipitation method and systematically investigated for their structural, optical, magnetic, and transport properties. The nanoparticles crystallize in the cubic ZnS phase with defect-assisted absorption features, confirming successful dopant incorporation without secondary impurity phases. Optical measurements reveal bandgap tuning influenced by the combined action of Cu- and Cr-induced states. Magnetic characterization at room temperature demonstrates clear ferromagnetic hysteresis across all co-doped compositions, with the degree of ferromagnetism strongly dependent on the relative Cu:Cr ratio. Cu-rich samples exhibit enhanced saturation magnetization and soft ferromagnetic behaviour, while Cr-rich samples show reduced magnetization but increased coercivity due to competing antiferromagnetic interactions. Magneto-transport studies further reveal pronounced negative magnetoresistance, the magnitude of which correlates directly with the strength of ferromagnetic ordering. This behaviour is consistent with a bound magnetic polaron percolation mechanism mediated by sulfur-vacancy-induced carriers. The results establish CuCr co-doped ZnS as a promising diluted magnetic semiconductor where room-temperature ferromagnetism and spin-dependent transport can be engineered through controlled co-doping. The tunable balance between magnetic ordering, anisotropy, and negative magnetoresistance highlights the potential of this system for spintronic and multifunctional optoelectronic applications.

过渡金属共掺杂已成为一种有效的策略来定制自旋电子应用的宽带隙半导体的磁性和电子特性。在这项工作中，通过简单的湿化学沉淀法合成了CuCr共掺杂ZnS纳米粒子，并系统地研究了它们的结构、光学、磁性和输运性质。纳米颗粒在具有缺陷辅助吸收特征的立方ZnS相中结晶，证实了没有二次杂质相的成功掺杂。光学测量揭示了Cu和cr诱导态的共同作用对带隙调谐的影响。室温下的磁性表征表明，所有共掺杂成分都有明显的铁磁滞后，铁磁程度强烈依赖于相对Cu:Cr比。富cu样品表现出增强的饱和磁化和软铁磁行为，而富cr样品表现出磁化降低但由于竞争的反铁磁相互作用而增加矫顽力。磁输运研究进一步揭示了明显的负磁阻，其大小与铁磁有序的强度直接相关。这种行为符合由硫空位诱导的载流子介导的束缚磁极化子渗透机制。结果表明，CuCr共掺杂ZnS是一种很有前途的稀释磁性半导体，通过控制共掺杂可以设计室温铁磁性和自旋相关输运。磁有序、各向异性和负磁阻之间的可调平衡突出了该系统在自旋电子和多功能光电应用中的潜力。

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引用次数: 0

Sn-Mg co-doping in textured BaM ferrites: modulation of magnetic and millimeter-wave properties 织构BaM铁氧体中Sn-Mg共掺杂：磁和毫米波特性的调制

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-29 DOI: 10.1016/j.jmmm.2026.173883

Yida Lei , Kui Liu , Yang Xiao , Yanlin Ma , Jie Li , Huaiwu Zhang

The development of self-biased ferrite materials is crucial for the miniaturization of non-reciprocal devices in communication systems. However, conventional BaM ferrites typically exhibit low remanence ratio (M_r/M_s), high sintering temperature, and high losses, which severely limit their practical applications. In this work, we present a novel textured ferrite ceramic, BaFe_12-x(Sn_0.5Mg_0.5)_xO₁₉ (x = 0.00–0.48), synthesized via a solid-state reaction combined with magnetic orientation. The results demonstrate that Sn⁴⁺ and Mg²⁺ ions were successfully incorporated into the ferrite lattice, leading to refined grain size and improved sample density. Notably, the composition with x = 0.24 exhibited excellent magnetic properties: M_s = 61.90 emu/g, M_r/M_s = 0.845, H_c = 1815 Oe, and ΔH = 1505 Oe (at 60 GHz). Compared with undoped BaM ferrites, this optimized material can be sintered at lower temperatures while achieving markedly higher M_r and a 43.81% reduction in FMR linewidth. By fitting the frequency-dependent ΔH values between 60 and 70 GHz, the Gilbert damping (α) is determined to be 0.0696. These improvements make the Sn-Mg co-doped, textured BaM hexaferrite a promising candidate for next-generation self-biased nonreciprocity devices.

自偏置铁氧体材料的发展对通信系统中非互易器件的小型化至关重要。然而，传统的BaM铁氧体具有低剩余率（Mr/Ms）、高烧结温度和高损耗等缺点，严重限制了其实际应用。在这项工作中，我们提出了一种新的织构铁氧体陶瓷，BaFe12-x(Sn0.5Mg0.5)xO19 (x = 0.00-0.48)，通过固态反应结合磁取向合成。结果表明：Sn4+和Mg2+离子被成功地引入到铁素体晶格中，晶粒尺寸细化，样品密度提高；值得注意的是，x = 0.24的组合物在60 GHz时表现出优异的磁性能：Ms = 61.90 emu/g, Mr/Ms = 0.845, Hc = 1815 Oe， ΔH = 1505 Oe。与未掺杂的BaM铁氧体相比，该优化材料可以在较低的温度下烧结，同时获得明显更高的磁导率，FMR线宽降低43.81%。通过拟合频率相关的ΔH值在60和70 GHz之间，确定吉尔伯特阻尼（α）为0.0696。这些改进使得Sn-Mg共掺杂的织构BaM六铁体成为下一代自偏置非互易器件的有希望的候选者。

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引用次数: 0

Perpendicular magnetized flexible CoFeB/pt multilayers with pt thickness dependent interfacial magnetic anisotropy 具有pt厚度相关界面磁各向异性的垂直磁化柔性CoFeB/pt多层膜

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-27 DOI: 10.1016/j.jmmm.2026.173878

Yan Liu , Bin Lao , Yali Xie , Huali Yang , Xilai Bao , Huatao Jiang , Ruoan Zou , Pengfei Xin , Yao Ying , Run-Wei Li

Earlier demonstration of magnetic film-based functionalities on flexible substrates have highlighted the importance of perpendicular magnetic anisotropy (PMA) in flexible electronics. Here we studied magnetic anisotropic properties of flexible CoFeB/Pt multilayers with various structural parameters including substrate roughness, layer thickness, and stacking period, to anatomy the involved variables on PMA magnitude. A robust PMA is achieved in flexible CoFeB/Pt multilayers after improving surface roughness of flexible substrate, which is identical to that grown on rigid substrate. CoFeB and Pt thickness dependent magnetic anisotropy analysis confirms that the PMA is originated from CoFeB/Pt interface with a constant magnitude of 0.39 erg/cm² regardless of the stack period. However, for Pt thickness below 1.5 nm, the interfacial PMA is gradually decrease, resulting in the magnetic easy axis shifts from perpendicular to planar orientation as the stacking period increases. After excluding possible influences from interfacial roughness and magnetic interlayer interactions, the reduction in PMA is attributed to limited orbital hybridization at the interface caused by the insufficient thickness of the Pt layer.

早期在柔性衬底上的基于磁膜的功能演示突出了垂直磁各向异性（PMA）在柔性电子中的重要性。本文研究了不同结构参数（衬底粗糙度、层厚和堆叠周期）下柔性CoFeB/Pt多层膜的磁各向异性，分析了PMA量级的相关变量。通过改善柔性基板的表面粗糙度，在柔性CoFeB/Pt多层材料中获得了与刚性基板相同的坚固PMA。与CoFeB和Pt厚度相关的磁各向异性分析证实，PMA来源于CoFeB/Pt界面，无论堆叠周期如何，PMA的恒定量级为0.39 erg/cm2。而Pt厚度在1.5 nm以下时，界面PMA逐渐减小，导致磁易轴由垂直方向向平面方向偏移。在排除了界面粗糙度和磁层间相互作用的可能影响后，PMA的减少归因于Pt层厚度不足导致的界面上轨道杂化有限。

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引用次数: 0

Magnetic properties and microstructural optimization of Ga modified Sm(Fe,Co,Ti)12 alloy ribbons Ga改性Sm(Fe,Co,Ti)12合金带的磁性能及组织优化

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173872

Jiaxing You , Jiajie Li , Chen Jiang , Yue Huang , Zhixi Deng , Munan Yang , Shuwei Zhong , Xiaoqiang Yu , Sajjad Ur Rehman

SmFe₁₂-based permanent magnets are regarded as potential next-generation of rare earth (RE) permanent materials due to the excellent intrinsic magnetic properties and reduced RE usage. Nevertheless, as a metastable phase, ThMn₁₂-type SmFe phase tends to decompose into other ferromagnetic phases such as α-Fe phase at high temperature, making it challenging to form this phase exclusively in ribbons or bulks. In this study, Sm(Fe_0.8Co_0.2)_11-xTiGa_x alloy ribbons with nanostructure were prepared by melt-spinning followed by heat treatment. The effects of Ga substitution on the phase composition, microstructure and magnetic properties of the ribbons are studied in detail. The results reveal that the introduction of Ga refines the grains of the 1:12 main phase during the heat treatment process, achieving a coercivity (H_c) of 5.21 kOe and a maximum magnetic energy product ((BH)_max) of 8.47 MGOe. The grain refinement leads to the enhancement of the domain wall pinning effect and the uniformly distributed TiFe₂ phase as a non-ferromagnetic phase between the main phase grains serves as pinning sites. This interplay is the primary reason for the coercivity enhancement of the ribbons. This work provides a viable strategy to construct the effective non-ferromagnetic intergranular phases in SmFe₁₂-based alloys, aiming to achieve outstanding comprehensive magnetic properties.

smfe12基永磁体具有优异的本征磁性能和较低的稀土用量，被认为是下一代稀土永磁体材料。然而，作为亚稳相，thmn12型SmFe相在高温下容易分解成α-Fe相等其他铁磁相，这使得在带状或块状中形成该相具有挑战性。本研究采用熔融纺丝后热处理的方法制备了具有纳米结构的Sm(Fe0.8Co0.2)11-xTiGax合金带。详细研究了Ga取代对带的相组成、微观结构和磁性能的影响。结果表明，在热处理过程中，Ga的引入细化了1:12主相的晶粒，矫顽力（Hc）达到5.21 kOe，最大磁能积（BH）max达到8.47 MGOe。晶粒细化导致畴壁钉钉效应增强，主相晶粒之间均匀分布的非铁磁相TiFe2充当钉钉位点。这种相互作用是带状矫顽力增强的主要原因。本研究为构建有效的非铁磁性晶间相提供了一种可行的策略，旨在实现smfe12基合金优异的综合磁性能。

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引用次数: 0

Comprehensive DFT study of CoCrTe and NiVTe half-Heuslers: Structure, magnetism, and optical response CoCrTe和NiVTe半heuslers的综合DFT研究：结构、磁性和光学响应

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173860

N. Bouzakraoui , A. Samih , R. El Fdil , Z. Fadil , E. Salmani , Chaitany Jayprakash Raorane , Seong-Cheol Kim , S. Saadaoui

This work examines the structural, mechanical, electronic, magnetic, optical, and thermodynamic properties of CoCrTe and NiVTe half-Heusler alloys. Stability analysis identifies the β-configuration (X at 4c, Y at 4a, and Z at 4b) as the most favorable structure. Both compounds are thermodynamically stable, as confirmed by negative formation energies and convex hull analysis. Their mechanical and dynamical stability is further verified through elastic constants and phonon spectra. Electronic structure and magnetic properties are investigated using the GGA-PBE and meta-GGA-SCAN functionals to better describe the strongly correlated 3d states. The results reveal that both CoCrTe and NiVTe are ferromagnetic half-metals with a total magnetic moment of 3 μ_B, consistent with the Slater–Pauling rule, highlighting their potential for spintronic applications. Optical calculations indicate promising performance in infrared and ultraviolet optoelectronic devices. Finally, thermodynamic analysis demonstrates that both alloys possess excellent thermal stability.

本研究考察了CoCrTe和NiVTe半heusler合金的结构、机械、电子、磁性、光学和热力学性质。稳定性分析确定β-构型（X在4c， Y在4a， Z在4b）是最有利的结构。这两种化合物都是热力学稳定的，正如负地层能和凸包分析所证实的那样。通过弹性常数和声子谱进一步验证了它们的力学和动力学稳定性。利用GGA-PBE和meta-GGA-SCAN函数研究了电子结构和磁性能，以更好地描述强相关的三维态。结果表明，CoCrTe和NiVTe均为铁磁性半金属，总磁矩为3 μB，符合sllater - pauling规则，具有自旋电子应用潜力。光学计算表明红外和紫外光电器件具有良好的性能。最后，热力学分析表明，两种合金均具有优良的热稳定性。

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引用次数: 0

Structural, magnetic, electronic, optical, thermoelectric, and magnetocaloric properties of Pb2NbFeO6: A density functional theory and Monte Carlo simulations Pb2NbFeO6的结构、磁性、电子、光学、热电和磁热性质：密度泛函理论和蒙特卡罗模拟

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173875

M. Jerrari, R. Masrour

We employed Monte Carlo simulations in conjunction with density functional theory (DFT), using the GGA + SOC + U (Generalized Gradient Approximation with Spin-Orbit Coupling and Hubbard U correction) within the Wien2k framework, to investigate the structural, electronic, magnetic, optical, thermoelectric, and magnetocaloric characteristics of Pb₂NbFeO₆. Analysis of the density of states and band structures reveals ferromagnetic semiconducting behavior, with spin-up (L-Γ) and spin-down (L-Γ) indirect band gaps of 3.5 and 1.9 eV, respectively. Furthermore, the real part of the dielectric tensor shows a gradual increase, attaining a maximum at 3.3 eV, which reflects a strong polarization response within the visible spectrum, the imaginary component of the dielectric function exhibits a pronounced peak near 5 eV, reflecting strong optical absorption in the ultraviolet (UV) region, optical conductivity, absorption coefficient, optical reflectivity, refractive index, and extinction coefficient are examined. Computing the Seebeck coefficient, electrical conductivity, electronic thermal conductivity, power factor, figure of merit, and Hall coefficient as functions of temperature is evaluated. We have calculated magnetization, susceptibility, magnetic entropy changes (−ΔS), adiabatic temperature changes (ΔT), and relative cooling power (RCP) using Monte Carlo simulation methods. From the simulation results, a critical temperature of 32 K and an exchange coupling constant of J_Fe–Fe = 16 K are obtained. These results indicate that double perovskite materials hold promise for potential use in solar cells and optoelectronic devices, as well as thermoelectric applications.

在Wien2k框架下，利用GGA + SOC + U（自旋-轨道耦合和Hubbard U校正的广义梯度近似），结合密度泛函理论（DFT），采用蒙特卡罗模拟方法研究了Pb2NbFeO6的结构、电子、磁性、光学、热电和磁热特性。态密度和能带结构分析显示了铁磁半导体特性，自旋向上（L-Γ）和自旋向下（L-Γ）的间接带隙分别为3.5 eV和1.9 eV。此外，介电张量的实部逐渐增大，在3.3 eV处达到最大值，反映了可见光谱内较强的极化响应；介电函数的虚部在5 eV附近有一个明显的峰值，反映了紫外区较强的光吸收，考察了光导率、吸收系数、反射率、折射率和消光系数。计算塞贝克系数、电导率、电子导热系数、功率因数、优值图和霍尔系数作为温度的函数进行评估。我们使用蒙特卡罗模拟方法计算了磁化率、磁化率、磁熵变化（−ΔS）、绝热温度变化（ΔT）和相对冷却功率（RCP）。从模拟结果可以得到临界温度为32 K，交换耦合常数为JFe-Fe = 16 K。这些结果表明，双钙钛矿材料在太阳能电池、光电器件以及热电应用中具有潜在的应用前景。

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引用次数: 0

Quantum teleportation and entanglement via quantum channels in bimetallic Fe2Cu2 based on spin-1/2 Ising-Heisenberg chain model 基于自旋1/2 Ising-Heisenberg链模型的双金属Fe2Cu2中量子通道的量子隐形传态和纠缠

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173869

Mustapha Ait Lamine, Hamid Ez-Zahraouy

This paper investigates quantum teleportation and entanglement in polymeric bimetallic Fe₂Cu₂ coordination compounds, employing the exactly solvable spin-1/2 Ising-Heisenberg model. Using the transfer-matrix method, we systematically analyze how the anisotropy parameter Δ affects quantum entanglement and teleportation fidelity through Heisenberg spin dimers functioning as quantum channels. Additionally, we analytically calculate the channel concurrence, output state concurrence, formation entanglement, fidelity, and average fidelity as functions of temperature, magnetic field, and anisotropy for different input states, with comprehensive thermomagnetic phase diagrams identifying regions of quantum advantage. Our analysis reveals that Δ governs the fundamental balance between entanglement capacity and magnetic thermal robustness. Consequently, the strongly anisotropic regime is very stable, retaining quantum advantage even at high temperatures and strong magnetic fields due to improved longitudinal correlations, whereas the isotropic case reaches the best teleportation fidelity at low temperatures and weak fields. The results indicate demonstrate that maximally entangled input states consistently outperform partially entangled states. These findings establish that magnetic coordination polymers with tunable anisotropy constitute promising platforms for quantum communication applications, offering a balance between operational fidelity and environmental robustness.

本文采用精确可解自旋1/2的伊辛-海森堡模型，研究了聚合物双金属Fe2Cu2配位化合物中的量子隐形传态和纠缠。利用传递矩阵方法，系统分析了各向异性参数Δ如何通过海森堡自旋二聚体作为量子通道影响量子纠缠和隐形传态保真度。此外，我们分析计算了不同输入态的通道并发性、输出态并发性、形成纠缠、保真度和平均保真度作为温度、磁场和各向异性的函数，并使用综合热磁相图识别量子优势区域。我们的分析表明Δ控制着纠缠能力和磁热鲁棒性之间的基本平衡。因此，强各向异性状态非常稳定，即使在高温和强磁场下也能保持量子优势，这是由于纵向相关性的改善，而各向同性状态在低温和弱磁场下也能达到最佳的隐形传态保真度。结果表明，最大纠缠输入态的性能始终优于部分纠缠输入态。这些发现表明，具有可调各向异性的磁配位聚合物构成了量子通信应用的有前途的平台，在操作保真度和环境鲁棒性之间提供了平衡。

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引用次数: 0

Microstructural evolution during aging process in 2:17-type SmCo sintered magnets with different iron content 不同铁含量的2:17型SmCo烧结磁体时效过程中的组织演变

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173870

Shuai Wang , Chenchen Xu , Weixiao Hou , Hui Yong , Yu Wang , Jifan Hu

It is confirmed that the aging process to obtain excellent magnetic properties is different for the magnets with various Fe content, and the influence of isothermal aging duration and cooling rate on microstructure and magnetic properties of the magnets has been studied systematically. As the isothermal aging duration increases, the B_r of magnets with different Fe content decreases due to the increasing 1:5H phase. The isothermal aging duration is 4 h for the Sm(Co_balFe_0.227Cu_0.072Zr_0.023)_7.6 magnet (Magnet A, relatively low Fe content) to obtain optimal H_cj and H_k, which is shorter than that of the Sm(Co_balFe_0.263Cu_0.072Zr_0.023)_7.6 magnet (Magnet B): 8 h. The magnets that have undergone appropriate aged time exhibit complete cellular structure, high lamellar phase density and high Cu concentration at cell boundaries, which makes the magnets show high H_cj and H_k. It is also found that the magnet with lower Fe content exhibits a faster ordering transformation rate during the aging process. On the other hand, the optimal aging cooling rate required to achieve desirable magnetic properties varies with the Fe content in the magnets. At a cooling rate of 1.5 K/min, Magnet B with higher Fe content still maintains a high and homogeneous distribution of the peak Cu concentration at the cell boundaries, resulting in excellent magnetic properties. In contrast, a lower peak Cu concentration was observed in some cell boundaries of Magnet A under the same conditions, leading to the reduction of H_cj and H_k.

证实了不同铁含量的磁体获得优异磁性能的时效过程不同，并系统研究了等温时效时间和冷却速度对磁体组织和磁性能的影响。随着等温时效时间的延长，不同铁含量磁体的Br由于1:5H相的增加而降低。Sm(CobalFe0.227Cu0.072Zr0.023)7.6磁体（磁体A，铁含量相对较低）获得最佳Hcj和Hk的等温时效时间为4 h，短于Sm(CobalFe0.263Cu0.072Zr0.023)7.6磁体（磁体B）的等温时效时间为8 h。经过适当时效时间的磁体具有完整的胞体结构、较高的片层相密度和胞界处较高的Cu浓度，使得磁体具有较高的Hcj和Hk。在时效过程中，铁含量较低的磁体表现出更快的有序转变速率。另一方面，获得理想磁性能所需的最佳时效冷却速率随磁体中铁含量的不同而变化。在1.5 K/min的冷却速率下，铁含量较高的磁铁B在电池边界处仍然保持较高且均匀的Cu峰浓度分布，具有优异的磁性能。相反，在相同的条件下，磁铁a的某些细胞边界的Cu浓度峰值较低，导致Hcj和Hk的减少。

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引用次数: 0

Modeling of asymmetric hysteresis in silicon steel sheets under DC bias and experimental verification 直流偏压下硅钢片的不对称磁滞建模及实验验证

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-24 DOI: 10.1016/j.jmmm.2026.173866

Pengning Zhang , Kuncheng Li , Lihua Mu , Ningwei Chen , Jian Zhang , Jia Zou

Modeling the hysteresis characteristics of power-transformer cores under dc bias is of critical importance for safe and stable equipment operation. Although existing Jiles–Atherton (J–A) models can deliver acceptable accuracy, they generally require extensive experimental data to calibrate bias-dependent coefficients and are prone to numerical oscillations under strong bias. Within the Energetic hysteresis framework, the dc bias field is introduced directly into the energy-barrier function and analytical coupling relations are derived among the saturation coefficient, the asymmetric-loss coefficient, and the remanence offset. A hybrid finite-difference scheme is further employed to solve simultaneously the rate of change of magnetic induction and the loss distribution, while a particle-swarm optimization algorithm is adopted for parameter identification. The proposed model achieves high-accuracy, high-stability predictions of hysteresis loops and losses under dc bias conditions. Experimental results demonstrate that the model reproduces the asymmetric features of hysteresis loops at various bias levels, with computed losses in excellent agreement with measured values, confirming its validity and engineering applicability.

电力变压器铁心在直流偏置下的磁滞特性建模对设备的安全稳定运行至关重要。虽然现有的Jiles-Atherton （J-A）模型可以提供可接受的精度，但它们通常需要大量的实验数据来校准偏倚相关系数，并且在强偏倚下容易出现数值振荡。在能量滞回框架内，将直流偏置场直接引入能量势垒函数，推导出饱和系数、不对称损耗系数和剩余物偏移量之间的解析耦合关系。采用混合有限差分格式同时求解磁感应变化率和损耗分布，并采用粒子群优化算法进行参数辨识。该模型在直流偏置条件下实现了高精度、高稳定性的磁滞回线和损耗预测。实验结果表明，该模型再现了不同偏置水平下迟滞回路的不对称特征，计算损失与实测值吻合良好，验证了该模型的有效性和工程适用性。

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引用次数: 0

Towards absolute measurements of magnetic losses by the rotational single sheet tester (RSST): an interlaboratory comparison 通过旋转单片测试仪（RSST）实现磁损耗的绝对测量：实验室间的比较

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

Journal of Magnetism and Magnetic Materials

Pub Date : 2026-01-23 DOI: 10.1016/j.jmmm.2026.173856

Carlo Appino , Enzo Ferrara , Nicoleta Banu , Clementine Delaunay , Fabien Sixdenier , Charles Joubert , Carlo Ragusa , Song Huang , Luigi Solimene , Olivier de la Barrière , Fausto Fiorillo

A comparison of the magnetic energy loss measurement in non-oriented Fe–Si sheets under alternating and rotational polarization has been accomplished by four European laboratories using different Rotational Single-Sheet Tester (RSST) setups and different sample shapes. The measurements, performed in the frequency and polarization intervals 5 Hz ≤ f ≤ 200 Hz, 1.0 T ≤ J_p ≤ 1.5 T, aimed at providing a benchmark test for these special measurements, looking for a connection between the RSST outcomes and absolute loss values, obtained by a combination of IEC 60404-2 Epstein data and precise local measurements. The laboratory-averaged RSST alternating loss values are found to range in a ±5% interval around the reference values, with the lab-to-lab discrepancies chiefly descending from the heterogeneous variety of the employed magnetic circuits. Numerical analysis highlights the critical role of the effective field and its uniformity across the RSST sensing area. The statistical assessment of the laboratories' best estimates provides the empirical standard deviations s = 4.5% and s = 3.6% for the alternating and rotational loss figures, respectively, thereby showing a significantly reduced dispersion of the results compared with a previous international comparison launched in the ‘90s. It additionally points to the circular geometry for both sample and magnetizer as best suited for the prospective standardization of 2D measurements.

比较了四个欧洲实验室使用不同的旋转单片测试仪（RSST）装置和不同的样品形状，在交变极化和旋转极化条件下无取向铁硅片的磁能损耗测量结果。在5 Hz≤f≤200 Hz， 1.0 T≤Jp≤1.5 T的频率和极化区间进行测量，旨在为这些特殊测量提供基准测试，寻找RSST结果与绝对损耗值之间的联系，这些数据是通过IEC 60404-2 Epstein数据和精确的本地测量相结合获得的。实验室平均RSST交变损耗值在参考值周围±5%的范围内，实验室与实验室之间的差异主要是由于所采用磁路的异质性。数值分析强调了有效场及其在RSST传感区域内的均匀性的关键作用。对实验室最佳估计的统计评估为交替损失和旋转损失数据分别提供了s = 4.5%和s = 3.6%的经验标准偏差，从而表明与上世纪90年代启动的先前国际比较相比，结果的分散性显著降低。它还指出，样品和磁化器的圆形几何形状最适合于二维测量的未来标准化。

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引用次数: 0