Samarium–cobalt magnet
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Samarium–cobalt magnets belong to the category of rare-earth magnets and are composed of samarium, a rare-earth element, and cobalt, a transition metal. They are among the strongest permanent magnets.
1980s vintage headphones using Samarium Cobalt magnets
Neodymium magnet
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A neodymium magnet is a permanent magnet made from an alloy of neodymium, iron, and boron that forms the Nd2Fe14B tetragonal crystalline structure. They are the most widely used type of rare-earth mag
Samarium–cobalt magnet
…Dayton. In particular, Strnat and Ray developed the first formulation of SmCo5. Samarium–cobalt magnets are generally ranked similarly in strength to neodymium magnets, but have higher temperature ratings and higher coercivity. Some attributes of samarium–cobalts are…
Block of neodymium magnet
Left: high-resolution transmission electron microscopy image of Nd2Fe14B; right: crystal structure with unit cell marked
Neodymium magnets (small cylinders) lifting steel spheres. Such magnets can lift thousands of times their own weight.
Ferrofluid on a glass plate displays the strong magnetic field of the neodymium magnet underneath.