A material where magnetic atoms are arranged so their magnetic fields point in opposite directions, canceling each other out and creating zero overall magnetism.
From anti- (against) + ferromagnet (iron-based magnetic material). Coined in the 20th century by physicists studying magnetic properties of crystals and minerals.
Antiferromagnets are invisible magnets—they're made of billions of tiny magnets all fighting each other, so nothing gets attracted to them! Scientists are now using them in cutting-edge computer technology because they can store information without the power waste of regular magnets.
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