View in EDS

Magnetic Shielding in a Planar Geometry: Using Ferromagnetic Washers to Screen In-Plane Fields

Saved in:
Bibliographic Details
Title: Magnetic Shielding in a Planar Geometry: Using Ferromagnetic Washers to Screen In-Plane Fields
Authors: Pirottin, Thomas, Fourneau, Emile, Silhanek, Alejandro, Vanderbemden, Philippe, Vanderheyden, Benoît
Contributors: Montefiore Institute - Montefiore Institute of Electrical Engineering and Computer Science - ULiège, Q-MAT - Quantum Materials - ULiège, F.R.S.-FNRS - Fonds de la Recherche Scientifique, CHIST-ERA, FWO - Fonds Wetenschappelijk Onderzoek Vlaanderen
Source: IEEE Transactions on Magnetics. 61:1-10
Publisher Information: Institute of Electrical and Electronics Engineers (IEEE), 2025.
Publication Year: 2025
Subject Terms: planar geometry, Physique, Physics, Physique, chimie, mathématiques & sciences de la terre, Ingénierie électrique & électronique, Magnetic shielding, Materials science & engineering, Engineering, computing & technology, Ingénierie, informatique & technologie, Science des matériaux & ingénierie, on-chip, Physical, chemical, mathematical & earth Sciences, ferromagnetic washer, ferromagnetic ring, magnetic metamaterials, Electrical & electronics engineering
Description: Magnetic shielding is a crucial aspect for many electronic devices and sensors. In this paper, we investigate the magnetic shielding properties of ferromagnetic washers in a planar geometry in view of an integration with on-chip devices, focussing on the transverse configuration, i.e. with the applied f ield parallel to the plane of the washer. We show that, in this configuration, the shielding factor of a washer can exceed the predictions of previous studies. We argue that the magnetic shielding results from the capture of the external magnetic flux by the upper and lower faces of the washer, and its subsequent channeling through the washer material and around the central hole. We present experimental results and numerical simulations, and discuss the influence of the geometry of the washer, the permeability and the saturation of the ferromagnetic material. We propose an explanation for the observed behaviour and provide empirical formulae to estimate different quantities char acterizing the shielding properties of washers in the transverse configuration.
Document Type: Article
ISSN: 1941-0069
0018-9464
DOI: 10.1109/tmag.2025.3542188
Access URL: https://hdl.handle.net/2268/328389
https://doi.org/10.1109/tmag.2025.3542188
Rights: IEEE Copyright
Accession Number: edsair.doi.dedup.....b92202e1f0c35d2b2b7ed53d85efc799
Database: OpenAIRE
Description
Abstract:Magnetic shielding is a crucial aspect for many electronic devices and sensors. In this paper, we investigate the magnetic shielding properties of ferromagnetic washers in a planar geometry in view of an integration with on-chip devices, focussing on the transverse configuration, i.e. with the applied f ield parallel to the plane of the washer. We show that, in this configuration, the shielding factor of a washer can exceed the predictions of previous studies. We argue that the magnetic shielding results from the capture of the external magnetic flux by the upper and lower faces of the washer, and its subsequent channeling through the washer material and around the central hole. We present experimental results and numerical simulations, and discuss the influence of the geometry of the washer, the permeability and the saturation of the ferromagnetic material. We propose an explanation for the observed behaviour and provide empirical formulae to estimate different quantities char acterizing the shielding properties of washers in the transverse configuration.
ISSN:19410069
00189464
DOI:10.1109/tmag.2025.3542188