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I am en engineer in the field of non-chemical fluid conditioning.
With respect to a bar magnet, what are the implications of the internal Bloch wall specifically on the shape of the external magnetic field ? Why ?
Aenertec America, USA
In any standard magnet, there are lots of internal domain walls. They
are very important for determining the magnetic field on a microscopic
scale, and (by getting stuck on defects) for keeping the material from
losing its magnetization. However, the external field can be treated
well by ignoring the microscopic details and treating the magnet as a
block of material with uniform magnetization, i.e. averaging over many
(republished on 07/13/06)
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