The Chemistry of Magnets: From Lodestone to Tech

The earliest known magnet was lodestone, a naturally magnetized form of iron ore.
Magnets work because of aligned electron spins, creating tiny magnetic fields that add up.
Iron, cobalt, and nickel are the classic ferromagnetic metals that form strong magnets.
Ancient sailors used lodestone compasses to navigate oceans long before GPS.
Rare-earth magnets, like neodymium magnets, are the strongest permanent magnets known.
Heating a magnet above its Curie temperature makes it lose its magnetism.
Magnets are central to technology, powering motors, speakers, and hard drives.
MRI machines use powerful magnets to image the human body without X-rays.
Even Earth itself acts like a giant magnet, with a magnetic field that shields us from solar wind.
From ancient navigation to quantum computing, magnetism shows how chemistry shapes technology.