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# H in magnets

- To: femm@yahoogroups.com
- Subject: H in magnets
- From: marco valcavi <mvalca@yahoo.com>
- Date: Wed, 3 Oct 2001 08:10:04 -0700 (PDT)

    Hi!

    I noted that there is a strange calculation of the H
    field in the permanent magnets.

    I inserted data about a ceramic ferrite, following the
    instruction, so I shifted the demagnetization curve to
    the right to meet the origin.
    I include this magnet in an axisimmetric magnetic
    circuit with steel and a gap.

    Inspecting with FEMM (3.0 and 3.1) the H field, I
    found that the output of the H field (Hout) is
    different from the correct value (Hcorrect):

    Hcorrect=Hc - Hout

    where Hc is the coercitivity field .

    This strange value affect all the calculation based on
    the H field inside the magnet.

    bye (ciao)

    Marco

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