Aluminium Nickel Cobalt (AlNiCo) magnet is the weakest type of magnet amongst Neodymium Rare Earth and Ferrite Magnets. AlNiCo magnets also lose their magnetisation relatively easily. This magnet is popular in engineering and manufacturing industries due to its strength and operating temperature up to 500 degree Celsius. It also popular for underwater or sub sea applications due to its high resistance to corrosion.
Due to its low adhesive force, AlNiCO magnets like Horseshoe magnets are suitable and perfect for classroom demonstrations to show the north and south polarities. These magnets are very safe for students.