Hysteresis and loss characteristics of Fe-based nanocrystalline alloys based on a novel variable-temperature dynamic Jiles–Atherton hysteresis model

Xu, Xueping; Zhao, Zhenkai; Ren, Jianyi; Ma, Danyue

doi:10.1088/1361-6463/ad0fbc

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…According to Faraday's Law of Electromagnetic Induction, the magnetic induction, B, is calculated by integrating the induced voltage in the secondary coil. The magnetic field strength, H, is derived from the Ampere's loop theorem [20,21].…”

Section: Sample Preparation and Experimental Equipmentmentioning

confidence: 99%

Study on the magnetic shielding properties of nanocrystalline strips under bending stress

Yuan,

Xu,

Wang

et al. 2024

Phys. Scr.

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The study of the magnetic properties of nanocrystalline materials under stress is of great significance for the construction of small and lightweight magnetic shielding rooms. Therefore, this paper investigates the effect of stress on the magnetic properties of nanocrystalline materials under the action of external bending stress. By comparing the test results of the soft magnetic measuring device with and without bending stress, it is found that the magnetic permeability (μi) decreases by about 51.41% when the introduced bending stress σ is increased by about 5.96"×" 107 pa, whereas the "K" _"u" ^"Fe-Si" (induced magnetic anisotropy constant) and "H" _"k" (field of magnetic anisotropy) increase by 5.30"×" 102 J/m3and 1.08"×" 102 A/m, respectively. The Jiles-Atherton (J-A) model considering the bending stress and radius of change correlation is established, and the typical parameters of the J-A model are fitted using the Gazelle Optimization Algorithm (GOA), and the RMSE (root mean square error) of all of them are less than 0.056 T. The magnetic domain density increased with the increase of bending stress, which verified the correlation between the J-A model parameters and the bending stress. Our results reveal that the nanocrystalline macroscopic and micromechanical magnetic properties can be effectively combined with the J-A model, which will provide a theoretical basis for the simulation study of the nanocrystalline magnetic shielding device in the actual stress situation.

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Section: Sample Preparation and Experimental Equipmentmentioning

confidence: 99%

Study on the magnetic shielding properties of nanocrystalline strips under bending stress

Yuan,

Xu,

Wang

et al. 2024

Phys. Scr.

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show abstract

“…The minor accuracy error of single factors, such as the magnetic properties of shielding materials [12], system structure, and the assembly process, can cause significant differences between design indicators and actual performance, which is a critical issue in constructing magnetic shielding devices. Among these, the accuracy of the permeability of shielding materials is crucial for the precise assessment of the shielding performance of the system [13].…”

Section: Introductionmentioning

confidence: 99%

Analytical model and precise evaluation of multi-layer magnetic shielding performances considering ultra-weak magnetic properties

Xu,

Wu,

Zhao

et al. 2024

J. Phys. D: Appl. Phys.

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Regarding the vast difference between the design index and the actual performance of magnetic shielding devices, this paper proposes a novel method of using precise permeability under a specific weak magnetic field, aiming to improve the design accuracy of shielding performance. Firstly, the relative permeability of the permalloy is measured under the applied magnetic field from the geomagnetic field down to 1 nT. Next, the precise shielding coefficient formulas of the single- and double-layer spherical shells are derived. For the double-layer spherical shell, the deviation of remanence between considering the ultra-weak magnetic properties and using the constant permeability is 24.3%. This clarifies the necessity of considering the ultra-weak magnetic properties in multi-layer structures. Then, a new accurate method of the shielding coefficient for the finite-length magnetic shielding cylinder is proposed, with a deviation of less than 5%. Finally, this method has been validated again by remanence measurement of the three-layer magnetic shielding cylinders. The deviation between simulation and experiment is 4.03% when considering the ultra-weak magnetic properties. While using the constant permeability, the deviation is as high as 19.31%.Therefore, considering the ultra weak magnetic properties in multi-layer structures can-significantly improve the accuracy of the performance evaluation.

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“…Yang et al has further tested the B-H relationship and studied the corresponding remanence of MSR under the degaussing waveform of various parameters [16]. In the previous research, the magnetic properties are generally tested using a toroidal sample instead of the square permalloy plate of the practical use [17][18][19]. The magnetic characteristics of Mumetal in various physical shapes and dimensions are affected by the different annealing temperatures during the heat treatment process [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

The SF and remanence evaluation of magnetic shields based on SST for low-frequency and degaussing situation

Shi,

Zhang,

Yang

et al. 2024

J. Phys. D: Appl. Phys.

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The permalloy sheet, as the dominant shielding functional material, mainly determines static and low frequency shielding performance of magnetically shielded room (MSR). However, lack of measurement of shielding sheet in practical use would lead to the nonnegligible evaluation error for MSR performance. Therefore, an estimation technique of shielding factor (SF) and the remanence of MSR is proposed in this paper with the consideration of the nonlinear magnetic characteristics of the permalloy sheet tested by single sheet tester for low frequency field and degaussing situation(L-D-SST). First, a high-accuracy measurement system, composed of L-D-SST (for exciting magnetic field and sensing the corresponding B and H) and the control system (for applying excitation to L-D-SST and amplifying, filtering and collecting B and H signal), is established. The weak magnetic fields of low frequencies and decaying alternating demagnetizing field excitations are separately applied to L-D-SST for basic magnetization curves (BM curves) and anhysteretic magnetization curve (AM curve) test. Furthermore, the BM and AM curves are respectively integrated with FEM algorithm for the accurate and reliable estimation of the SF and remanence of MSR in operation state. In addition, the tested magnetic properties are applied to the optimization of MSR shielding quality.

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Hysteresis and loss characteristics of Fe-based nanocrystalline alloys based on a novel variable-temperature dynamic Jiles–Atherton hysteresis model

Cited by 10 publications

References 33 publications

Study on the magnetic shielding properties of nanocrystalline strips under bending stress

Study on the magnetic shielding properties of nanocrystalline strips under bending stress

Analytical model and precise evaluation of multi-layer magnetic shielding performances considering ultra-weak magnetic properties

The SF and remanence evaluation of magnetic shields based on SST for low-frequency and degaussing situation

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