Ferromagnetic materials are those such as iron and nickel that are able to maintain their magnetic properties even after the magnetic field is removed. The prefix, Ferro is the Latin word for iron (this is the reason behind the atomic symbol of iron- Fe), a material which displays strong magnetic properties. Electrons are said to exhibit a small magnetic field as they spin and orbit the nucleus of an atom. For most, the combinations of electrons in their orbits cancel each other out. For ferromagnetic materials, the case is not the same as the electron fields in the atoms do not cancel out, so they exhibit a long-range ordering phenomenon at the atomic level. Due to this long range ordering phenomenon, the unpaired electron spins to line up parallel with each other in a region called a domain. Ferromagnetic materials will respond mechanically to an impressed magnetic field, which changes the length slightly toward the direction of the applied field