Magnetic wheel by steel shielding

[Floor]

Mu metal's use as a shield in electronic equipment has been around for 80 + years ?
Mu metal, although it can shield an object, is strongly attracted to magnets. 
It is not neutral to them. 

Ordinarily magnetic shields are FIXED IN PLACE and used to prevent interference
between electronic components.

Typically electromagnetic components rather than purely magnetic components (inductors)
are the things that are being shielded.

In a mechanical system, typically the shielding material itself, will be attracted to magnets.

It there fore requires an input of energy (as mechanical work) to install and  / or
to remove a shield from between two magnets.  The energy use to do so, is typically
equal to any work that can be done, by the shielded magnet or magnets.  There is then
no net gain in energy.

It then becomes apparent that the shield must neutralize the force between two magnet
while at the same time, the shield must have a degree force neutrality  to the shielded
magnets.

https://overunity.com/18511/floors-magnets-explained/
    and
https://overunity.com/18551/magnet-shear-to-direct-pull-work-ratio/
  and so on

[nix85]

Mu metal's use as a shield in electronic equipment has been around for 80 + years ?
Mu metal, although it can shield an object, is strongly attracted to magnets. 
It is not neutral to them.

Exactly. Same goes for all ferromagnetic materials.

Speaking of ferromagnetic materials, 5% of your brain is made of Magnetite (Iron Oxide Fe3O4) crystals.

[kampen]

Vienna University Of Technology
By VIENNA UNIVERSITY OF TECHNOLOGY FEBRUARY 27, 2021

Surprise in Solid-State Physics: Magnetic Effect Without a Magnet
See below:
https://scitechdaily.com/surprise-in-solid-state-physics-magnetic-effect-without-a-magnet/

[nix85]

Plastic magnetic cores

https://www.youtube.com/watch?v=JQHUZITimUI

Coil repelled by a rock

https://www.youtube.com/watch?v=muJqtz-ECfg

[nix85]

Good to remember, the left hand rule.

When electron goes into the screen as shown by curling fingers, north pole is to the right.