Ferromagnetism is the basic mechanism bi which certaint materials (sic as airn) form permanent magnets, or are attractit tae magnets. In pheesics, several different types o magnetism are distinguished. Ferromagnetism (includin ferrimagnetism) is the strangest type; it is the anly teep that creates forces strang eneuch tae be felt, an is responsible for the common phenomena o magnetism encoontered in everyday life. Ither substances respond waikly tae magnetic fields wi twa ither types o magnetism, paramagnetism an diamagnetism, but the forces are sae waik that thay can anly be detectit bi sensitive instruments in a laboratory. An everyday ensaumple o ferromagnetism is a refrigerator magnet uised tae hauld notes on a refrigerator duir. The attraction atween a magnet an ferromagnetic material is "the quality o magnetism first apparent tae the auncient warld, an tae us the day".