ALNICO magnets are made from an alloy of aluminum, nickel, and cobalt, known for their excellent temperature stability and high residual induction. SMCO NdFeB magnets, made from samarium, cobalt, neodymium, iron, and boron, are powerful rare-earth magnets with high magnetic energy. Ferrite magnets, made from iron oxide and other metals, are cost-effective and have good resistance to demagnetization.