Einstein–de Haas effect: a change in magnetic moment causes the body to rotate

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Einstein–de Haas effect​

The Einstein–de Haas effect is a physical phenomenon in which a change in the magnetic moment of a free body causes this body to rotate. The effect is a consequence of the conservation of angular momentum. It is strong enough to be observable in ferromagnetic materials.

Einstein-de Haas effect: a bridge linking mechanics, magnetism, and topology
The Einstein-de Haas (EdH) effect is an interesting phenomenon linking mechanics and magnetism, in which changes in magnetization induce mechanical rotation.


I have no idea (as yet) if or how this effect might be incorporated into electric motor design..?
I just know that the polarity of magnetic fields in motor coils changes fast and a lot and that there are motor designers here that might find this interesting and possibly come up with a way to incorporate this effect into motors to er... good effect!? :)
 
Haven't read any of these, but a quick google for "Einstein–de Haas effect as used in "motors" " finds some stuff about tiny molecular motors:

link.springer.com

The Einstein–de Haas Effect and Its Application to Spin-Driven Molecular Motors

When the angular momentum of spin is converted into that of lattice, it gives a mechanical torque for rotation to the system, which is known as the Einstein–de Haas effect. Here, we propose to utilize this principle to create spin-driven molecular motors....
link.springer.com link.springer.com
 
amberwolf said:
Haven't read any of these, but a quick google for "Einstein–de Haas effect as used in "motors" " finds some stuff about tiny molecular motors:

link.springer.com

The Einstein–de Haas Effect and Its Application to Spin-Driven Molecular Motors

When the angular momentum of spin is converted into that of lattice, it gives a mechanical torque for rotation to the system, which is known as the Einstein–de Haas effect. Here, we propose to utilize this principle to create spin-driven molecular motors....
link.springer.com link.springer.com
Click to expand...
I'm thinking maybe a thick Ferro-Fluid instead of Laminations and get the little (electrically insulated/oxide?) ferro balls to rotate N-S-N-S rather than magnetize one way and then the other the whole time, but whatTH do I know!? :)
 
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