The fluxgate ring-core demagnetization field

M. De Graef, M. Beleggia

Research output: Contribution to journalJournal articleResearchpeer-review


The local demagnetization factor for the ring-core flux gate is derived analytically, based on a tangential magnetization model. The results are in good agreement with experimental data for a wide range of ring shape parameters. Approximate expressions in the limit of a narrow, thin ring are obtained, and indicate that the local demagnetization factor scales with the ratio of the cross-sectional area to the total area of the ring. Analytical modeling of the demagnetization factors for a uniform magnetization state results in an underestimate of the local cross-section averaged demagnetization factors by 50% or more.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Issue number2
Pages (from-to)403-409
Number of pages7
Publication statusPublished - 2006
Externally publishedYes


  • Demagnetization factors
  • Fluxgate
  • Internal field
  • Shape amplitude


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