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Demagnetizing factors for a hollow sphere
journal contribution
posted on 2023-06-09, 13:00 authored by Jordi Prat-Camps, Carles Navau, Alvaro Sanchez, Du-Xing ChenThe demagnetization problem for a hollow sphere of inner radius a, outer radius b, and material susceptibility ? is solved analytically. As a/b increases from 0 to 1, the magnetometric demagnetizing factor Nm decreases from 1/3 when ? > 0 and increases from 1/3 when ? <; 0. In the limit a/b = 1, Nm decreases from 1 to 0 as ? increases from -1 to 8. As a/b increases from 0 to 1, the fluxmetric demagnetizing factor Nf decreases from 1/3 and has a negative minimum when ? <; -3/4. These features are explained conceptually and quantitatively. As an application, magnetic shielding by a spherical shell is quantitatively analyzed.
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- Published
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Journal
IEEE Magnetics LettersISSN
1949-307XPublisher
Institute of Electrical and Electronics EngineersExternal DOI
Issue
130010Volume
7Page range
1-4Department affiliated with
- Informatics Publications
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- No
Peer reviewed?
- Yes
Legacy Posted Date
2018-04-24First Compliant Deposit (FCD) Date
2018-04-24Usage metrics
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