Enhanced magnetic field concentration using windmill-like ferromagnets
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Date
2024-02-01
Authors
Bort-Soldevila, Natanael
Cunill-Subiranas, Jaume
Barrera, Aleix
Del-Valle, Nuria
Silhanek, Alejandro V.
Uhlíř, Vojtěch
Bending, Simon
Palau, Anna
Navau, Carles
ORCID
0000-0002-0512-6329Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
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Abstract
Magnetic sensors are used in many technologies and industries, such as medicine, telecommunications, robotics, the Internet of Things, etc. The sensitivity of these magnetic sensors is a key aspect, as it determines their precision. In this article, we investigate how a thin windmill-like ferromagnetic system can hugely concentrate a magnetic field at its core. A magnetic sensor combined with such a device enhances its sensitivity by a large factor. We describe the different effects that provide this enhancement: the thickness of the device and its unique windmill-like geometry. An expression for the magnetic field in its core is introduced and verified using finite-element calculations. The results show that a high magnetic field concentration is achieved for a low thickness-diameter ratio of the device. Proof-of-concept experiments further demonstrate the significant concentration of the magnetic field when the thickness-diameter ratio is low, reaching levels up to 150 times stronger than the applied field. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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Citation
APL Materials. 2024, vol. 12, issue 2, p. 1-7.
https://pubs.aip.org/aip/apm/article/12/2/021123/3266669/Enhanced-magnetic-field-concentration-using
https://pubs.aip.org/aip/apm/article/12/2/021123/3266669/Enhanced-magnetic-field-concentration-using
Document type
Peer-reviewed
Document version
Published version
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Language of document
en