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Multi-Layer Magnetic Shields Based on Fe-Based Nanocrystalline and Co-Based Amorphous Ribbons.

Yanfeng Liang^1,2, Benchang Liu^1,2, Haoran Ma²

¹School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.

Materials (Basel, Switzerland)

|May 27, 2026

Summary

This summary is machine-generated.

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.

Keywords:

amorphous alloys finite element analysis magnetic shielding nanocrystalline

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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.