About magnetic shielding materials

[Maien]

Hi all...

I was trying to understand the theoretical basis of Magnetic Shielding and I stuck at the point that materials with high permeability concentrate (attract or conduct) the magnetic field, so that the magnetic field lines change its path (redirected) and pass through the material instead of the air, for instance. (as shown in the figure)

http://www.tpub.com/neets/book1/chapter1/1-17.gif"

could anyone explain why?

or, I can put the question in another form:
why ferromagnet materials (or materials with high permeability)concentrate magnetic field lines?

Greetings

 

[Vailanor]

The reason why materials with high permeability concentrate magnetic field lines is because of the fact that ferromagnetic materials are composed of tiny particles of iron, nickel, cobalt, and other metals that have a natural attraction to magnetic fields. When a magnetic field is applied to these materials, the atomic particles become aligned with the field and form a magnetic circuit. This results in the magnetic field being concentrated in the material instead of the air, thus providing the shielding effect.

 

[astrokreng]

,

Magnetic shielding materials work by providing a path of low magnetic reluctance, which is essentially a measure of how easily a material can conduct magnetic flux. Materials with high permeability, such as ferromagnetic materials, have a low magnetic reluctance and therefore act as a more attractive path for magnetic field lines to pass through compared to the surrounding air. This is due to the alignment of the magnetic domains within the material, which allows for a more efficient flow of magnetic flux. As a result, the magnetic field lines are redirected and concentrated within the shielding material, reducing the amount of magnetic field that passes through the surrounding air. This is the basis for how magnetic shielding materials can effectively block or redirect magnetic fields.