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Testing and Analysis Method of Low Remanence Materials for Magnetic Shielding Device
Yuan Cheng1,2, Yaozhi Luo1, Ruihong Shen1,2
1College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China.
Materials (Basel, Switzerland)
|January 21, 2023
Summary
Detecting material remanence is crucial for sensitive magnetic shielding. This study introduces a novel method within a magnetic shielding cylinder to accurately measure material remanence, reducing interference for reliable device construction.
Area of Science:
- Materials Science
- Electromagnetism
- Metrology
Background:
- High-performance magnetic shielding requires materials with minimal remanent magnetic fields, often at the nanotesla (nT) level.
- Internal components' remanence can compromise the shielding effectiveness of sensitive devices.
- Existing measurement techniques lack environmental control, leading to interference and inaccurate assessments in weak magnetic fields.
Purpose of the Study:
- To develop and validate a novel method for measuring material remanence within a magnetic shielding cylinder.
- To mitigate external magnetic field interference, such as Earth's magnetic field, during material testing.
- To identify suitable materials for constructing magnetic shielding devices targeting residual magnetic field levels of 1 nT, 10 nT, and 100 nT.
Main Methods:
- Implementation of a specialized magnetic shielding cylinder to create a controlled, low-field testing environment.
- Measurement of remanent magnetic fields of various materials, including concrete, composites, and metals, under shielded conditions.
- Systematic reduction of measurement errors by isolating the test sample from ambient magnetic fluctuations.
Main Results:
- The proposed method effectively minimizes external magnetic field interference, enabling more accurate remanence measurements.
- Demonstrated the capability to assess materials for applications requiring stringent residual magnetic field targets (1 nT, 10 nT, 100 nT).
- Identified specific material properties relevant to the performance of magnetic shielding devices.
Conclusions:
- The novel measurement technique provides a reliable approach for evaluating material suitability for advanced magnetic shielding.
- Accurate material characterization under shielded conditions is essential for achieving ultra-low remanent magnetic fields.
- This method supports the selection of optimal materials for constructing next-generation magnetic shielding systems.
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