ferromagnets

magnetic domains

Unexpected: Magnetic regions in metal blow past speed limit

You’re familiar with magnetism, but do you know what it looks like at the smallest scale? Take a block of iron, for example. It’s ferromagnetic, which means if you place it near a permanent magnet - like a refrigerator magnet - the block will also become magnetic to

ferromagnets

Looking for ghost particles in a frustrated world

In some of the many types of objects and events involving electrons, it is helpful to think that these particles are made up of three smaller particles, called spinons, holons and orbitons. Physicists call these supposedly imaginary particles quasiparticles. By assuming that they exist, we get to simplify our calculations