Conventional hard disks are based on ferromagnets—materials in which the magnetic dipoles, or spins, associated with each atom all point in the same direction. This alignment gives the material a net ...

Antiferromagnets are magnetic materials in which magnetic forces, or spins, point in opposite directions, canceling each other out and resulting in no net magnetic field. Consequently, these materials ...

Light beams of varying intensities (yellow cylinders) help visualize magnetic domains (light and dark areas), separated by domain walls (red lines). When something draws us in like a magnet, we take a ...