Slit Toroidal Magnet Effect

[Jim Mac]

I have been searching for this effect and I stumbled on to something that MAY be it..  For now I will present the effect..  Then I will attempt to see if it can be used as I envision.  

This method can magnetize HALF a solid ferrous plate, while leaving the other half Not Magnetized.  I have previously tried to get this to happen with separate magnets around a disc, but could NEVER got it to work.  The field either extends to both sides,  OR Totally cancels in the entire steel.  But seems the Slit Ring Magnet "MAY" Unlock what I seek.

It may not sound like much off the cuff, but I see it very beneficial in the right setup.

Watch:

[Jim Mac]

So to start-  I will need to see if I can construct something like this..

   

I ferrous disc on a shaft that can rotate through the ring magnet slit.  When rotating, this "SHOULD" magnetize one side or only part of the disc.  If so,  during rotation, the magnetic domain would stay stationary from outside perspective, but within the disc itself, the magnetic domain will always be moving through the disc.

That's the first step..  See if I can find the right materials

[Lunkster]

I have been searching for this effect and I stumbled on to something that MAY be it..  For now I will present the effect..  Then I will attempt to see if it can be used as I envision.  

This method can magnetize HALF a solid ferrous plate, while leaving the other half Not Magnetized.  I have previously tried to get this to happen with separate magnets around a disc, but could NEVER got it to work.  The field either extends to both sides,  OR Totally cancels in the entire steel.  But seems the Slit Ring Magnet "MAY" Unlock what I seek.

It may not sound like much off the cuff, but I see it very beneficial in the right setup.

Watch:

This is very interesting.

I did notice that on the north side of the Viewing device, the flux was wider on the outer circumference of the magnet than what I observed on the inside of the magnet.
I noticed that on the south side of the viewing device, the flux was closer at the opening at the larger circumference of the magnet than the inside circumference of the magnet.

I can think of two possible reasons for this.  

1.  The cut opening was different on the north side of the magnet compared to the south side of the magnet, having a difference between width of the opening between the inner circumference and outer circumference of the magnet.

One way that could be used to test this is to put some graphite in the spaces between the metal plate magnet on both sides of the magnet and re-due the test again. 

2.  The cutting machine may have damaged the magnet during the cutting of the magnet through excessive heat. 

One way to test to see if this is what happened is to cut another magnet, but this time have the other polarity on top when you are cutting the magnet.

The video still has an interesting performance that truly needs to be explored further for possible applications.
I am looking forward to the next steps you will be taking with this finding.

Lukster

[Jim Mac]

Hey Lunkster-

I cut the slit with a wet saw - and both sides of the slit are still magnetized well.

This new video is quite revealing.  Using a whole ring magnet with no slit, the same thing happens, except North shows the field- Similar into when I held the steel perpendicular in the slit like a Tee, which was difficult to show on camera.

[Lunkster]

Thank you for running that new video for me.
That video answered most of my questions.

I would like to know why this happens.

By offsetting the flux from one side of the magnet to the other
seems that it should be able to create an offset in torque between the two
magnets with a metal bar attached  to them depending on 
what direction the assemblies pass by each other.

 I know you have some more test assemblies you
plan to build.  I am looking forward to the work you are doing
and seeing the test results!

Lunkster

[Jim Mac]

I did another major test-