ArticleMaterials (Basel, Switzerland)2023
Demagnetization Parameters Evaluation of Magnetic Shields Based on Anhysteretic Magnetization Curve.
Article in Materials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Loss Separation Modeling and Optimization of Permalloy Sheets for Low-Noise Magnetic Shielding Devices.Materials (Basel, Switzerland) · 2025Article
- A Novel Simulation Model of Shielding Performance Based on the Anisotropic Magnetic Property of Magnetic Shields.Materials (Basel, Switzerland) · 2024Article
- Fast Degaussing Procedure for a Magnetically Shielded Room.Materials (Basel, Switzerland) · 2024Article
- Enhancement of Magnetic Shielding Based on Low-Noise Materials, Magnetization Control, and Active Compensation: A Review.Materials (Basel, Switzerland) · 2024Review
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Authors and funding
7 authors.
Funding
Abstract
To achieve the nearly zero-field environment, demagnetization is an indispensable step for magnetic shields composed of high-permeability material, which adjusts the magnetization of the material to establish magnetic equilibrium with the environmental field and improve the shielding performance. The ideal demagnetization can make the high-permeability material on the anhysteretic magnetization curve to have a higher permeability than on the initial magnetization curve. However, inappropriate parameters of degaussing field cause the magnetization state to deviate from the anhysteretic magnetization curve. Therefore, this article proposes a new assessment criterion to analyze and evaluate the parameters of degaussing field based on the difference between the final magnetization state after demagnetization and theoretical anhysteretic state of the shielding material. By this way, the magnetization states after demagnetizations with different initial amplitude, frequency, period number and envelope attenuation function are calculated based on the dynamic Jiles-Atherton (J-A) model, and their magnetization curves under these demagnetization conditions are also measured and compared, respectively. The lower frequency, appropriate amplitude, sufficient period number and logarithmic envelope attenuation function can make the magnetization state after demagnetization closer to the ideal value, which is also consistent with the static magnetic-shielding performance of a booth-type magnetically shielded room (MSR) under different demagnetization condition.
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