Is there anything that works opposite of a
magnet? Instead of attracting metal, it repels it?
Not sure what you are driving at, but like poles of a magnet repel as do
like electrical charges.
Diamagnetism is almost what you are looking for, but not quite. There are a
no materials that repel all metals, but there are some materials that repel
all magnets. Some of these are: copper, lead, mercury, nitrogen, sodium
chloride, water. Most materials are paramagnetic. They become magnetized
the same direction as the magnet that comes near. This results in
attraction. A diamagnetic material becomes magnetized backwards from the
approaching magnet. The diamagnetic material and the magnet repel each
Dr. Ken Mellendorf
Illinois Central College
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Update: June 2012