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Published on: July 20, 2022
Multi-Layer Magnetic Shields Based on Fe-Based Nanocrystalline and Co-Based Amorphous Ribbons.
Yanfeng Liang1,2, Benchang Liu1,2, Haoran Ma2
1School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
Materials (Basel, Switzerland)
|May 27, 2026
Summary
This study developed a multi-layer magnetic shield using Fe-based nanocrystalline (FN) and Co-based amorphous (CA) materials. Optimal layering significantly enhances magnetic shielding effectiveness (SE) and broadens the working range, outperforming uniform layer designs.
Area of Science:
- Materials Science
- Electromagnetics
- Applied Physics
Background:
- Effective magnetic shielding is crucial for sensitive electronic devices.
- Composite magnetic shields offer tunable properties for enhanced performance.
- Understanding layer arrangement impacts shielding effectiveness (SE).
Purpose of the Study:
- To investigate the impact of layer number and arrangement on SE in composite magnetic shields.
- To analyze magnetic field attenuation within multi-layer shields.
- To optimize composite shield design for improved SE and working range.
Main Methods:
- Construction of multi-layer composite magnetic shields using Fe-based nanocrystalline (FN) and Co-based amorphous (CA) ribbons.
- Application of Finite Element Analysis (FEA) for magnetic field attenuation analysis.
- Layer-by-layer inversion calculations to model shielding performance.
Main Results:
- Increased shield layers enhance maximum SE (SEmax) and working range (WWR).
- Co-based amorphous (CA) excels in weak fields; Fe-based nanocrystalline (FN) performs better in strong fields.
- An FN/FN/CA configuration achieved SEmax of 51.7 dB within a 674.3 A/m WWR, improving SE by 14.4% over FN/FN/FN.
Conclusions:
- Composite magnetic shield design, particularly layer arrangement, critically influences SE.
- A gradient layering approach optimizes individual layer performance, enhancing overall SE.
- The developed composite shields demonstrate superior magnetic field attenuation capabilities.
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