basic magnet tutorial

[mind]

sorry my first post is a request!  i haven't finished building a working motor yet, but i'm getting there!

could someone point to or lay out some basics on magnets, such as:
specifically, which types are stronger than others.
also which metals and materials are attracted to magnets.
thanks

[phonicboom]

http://www.google.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q=magnets

http://science.howstuffworks.com/magnet.htm

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

http://www.bbc.co.uk/schools/scienceclips/ages/7_8/magnets_springs.shtml

http://www.coolmagnetman.com/magindex.htm

[mind]

i like this
http://www.dansdata.com/magnets.htm

i just ripped some magnets out of a harddrive.  these are sweet!
what is the material they are stuck to that insulates them???

[RunningBare]

i like this
http://www.dansdata.com/magnets.htm

i just ripped some magnets out of a harddrive.  these are sweet!
what is the material they are stuck to that insulates them???

If your talking about the metal, it's known as Mu-Metal, it has high permeability(highly attracted to magnets), it can be used as a shield, if you had a U shaped piece for instance and placed a magnet inside, then most of the flux is directed from one pole to the other, the mu-metal is effectively shorting out the poles.