Demagnetizing Field Caused by Specimen End Gaps in Electromagnet Measurements of Permanent Magnet Materials

Du Xing Chen

    Research output: Contribution to journalArticleResearch

    1 Citation (Scopus)

    Abstract

    © 2019 IEEE. The midplane and volume-averaged demagnetizing factors, Nmid and Nvol, for a uniformly magnetized cylinder of length ls and radius rs clamped in the pole gap of an electromagnet with end gaps of total length ds are calculated as functions of ds/ls and ls/(2rs) and used for converting the measured magnetization-field curves of an Alnico specimen for different values of ds. The maximum ds/ls allowed for permanent magnet measurements stated in IEC and ASTM standards are discussed.
    Original languageEnglish
    Article number8695751
    JournalIEEE Magnetics Letters
    Volume10
    DOIs
    Publication statusPublished - 1 Jan 2019

    Keywords

    • demagnetizing factors
    • electromagnet measurements
    • Magnetic instruments
    • permanent magnets

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