What type of material is known for being strongly attracted by magnets?

The type of material known for being strongly attracted by magnets is ferromagnetic material. Ferromagnetic materials, such as iron, cobalt, and nickel, have a special arrangement of their atomic structure that allows them to maintain a magnetic moment even in the absence of an external magnetic field. This characteristic is due to the alignment of their electron spins, which allows these materials to become easily magnetized and exhibit strong magnetic properties. When exposed to a magnetic field, ferromagnetic materials can enhance the magnetic field and become permanently magnetized.

Understanding the difference between ferromagnetic materials and others is important. For example, insulators do not conduct electricity and have very weak magnetic properties. Superconductors can exhibit perfect diamagnetism under certain conditions, meaning they repel magnetic fields rather than being attracted. Diamagnetic materials, on the other hand, are characterized by the property that they are weakly repelled by magnetic fields and do not exhibit magnetism in the way ferromagnetic materials do.