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# RE: [FEMM] Magnetization curves

- To: "FEMM mailing list" <femm@list.foster-miller.net>
- Subject: RE: [FEMM] Magnetization curves
- From: "Jiri Vecerka" <vecerkajiri@seznam.cz>
- Date: Fri, 2 Apr 2004 07:32:13 +0200
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    Hello
    NdFeB has linear magnetic characteristic with relative permeability around
    1,05. Hc depends on used material.
    Producers provides B and Hc and you can calculate relative permeability from
    that.
    This is for cold magnets, with temperature  the characteristic change, but I
    calculate with linear characteristic reduced about 10% of the Hc.
    B reduces  about 12% per 100C for NdFeB.

    Take a look for example:
    http://www.vacuumschmelze.de/dbw/public_vac/Homepage_en/$pages/Dauermagnete_
    startold

    Jiri Vecerka

    > [mailto:femm-bounces@list.foster-miller.net]On Behalf Of
    > agnaldo@if.ufrj.br
    > Sent: Friday, April 02, 2004 6:20 AM
    > Subject: [FEMM] Magnetization curves
    >
    > David, thanks for your answer about the vector potentia XY plot,
    > it was very
    > usefull to me.
    > Now I ask, once more, the FEMM people colaboration about another
    > problem; does
    > anybody has (or knows how to find)B(H) cuerves for NdFeB and SmCo5? The
    > caracteristics that are im FEMM data bank doesn´t agree with my
    > experimental
    > results.
    >                                 Thanks in advance.
    >                                                     Agnaldo

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  - Re: [FEMM] Magnetization curves
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- References:
  - [FEMM] Magnetization curves
    - From: agnaldo@if.ufrj.br

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