RE: [FEMM] Magnetization curves

["Jiri Vecerka" <vecerkajiri@xxxxxxxxx>]

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@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of
> agnaldo@xxxxxxxxxx
> 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