Did you say neodymium MAGNETS?!?!

[triska]

Check it out, here are the magnets in your hard drives
http://en.wikipedia.org/wiki/Neodymium_magnet

Does anyone know what the metal is on hard drive covers that blocks the magnetism?
Or if it is even a metal at all?

Just got some of these magnets, and they are super strong

 

[Howard]

Magnetic fields can be "blocked" with the use of a material with very high permeability, like Mumetal.

 

[Hyperlite]

How things work: Speakers.

oh, and on the magnetism coolness scale, ferrofluid and magnetorheological fluid are both much cooler than neodymium magnets http://www.youtube.com/watch?v=BTn2rtULhTI

 

[OutHouse]

i have a couple of HardDrive magnets on my desk and man those puppies are strong. i can stick them on my forearem and they still pull together.

 

[Jeff7]

I don't think it really blocks the magnetism - those neodymium magnets just have really tightly confined magnetic fields. Their influence is very concentrated close to their faces.


Want something dangerous? Try something like this.. (Caution, long page load times await. Their webmaster has never learned of the wonders of image resizing.)

Those things can probably crush the bones in your fingers.

 

[PottedMeat]

Originally posted by: triska
Check it out, here are the magnets in your hard drives
http://en.wikipedia.org/wiki/Neodymium_magnet

Does anyone know what the metal is on hard drive covers that blocks the magnetism?
Or if it is even a metal at all?

Just got some of these magnets, and they are super strong

The hard drive cover is aluminum and has no effect on the magnetic flux from the neodymium magnet. The metal bracket/holder attached to the magnet tightly controls where the flux goes.

http://en.wikipedia.org/wiki/Magnet_keeper

 

[AUMM]

Originally posted by: Hyperlite
How things work: Speakers.

oh, and on the magnetism coolness scale, ferrofluid and magnetorheological fluid are both much cooler than neodymium magnets http://www.youtube.com/watch?v=BTn2rtULhTI

very cool... got a link on how to make my own?