Alnico

Alnico magnets are another type of permanent magnet, named after its constituents: aluminum (Al), nickel (Ni), and cobalt (Co), along with iron and sometimes other elements like copper and titanium. Alnico magnets are known for their strong magnetic fields and high coercivity, making them resistant to demagnetization. They were among the first types of permanent magnets developed and have been used in various applications since the early 20th century.