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These samarium–cobalt magnet alloys (generally written as SmCo 5, or SmCo Series 1:5) have one atom of rare-earth samarium per five atoms of cobalt. By weight, this magnet alloy will typically contain 36% samarium with the balance cobalt. [9] The energy products of these samarium–cobalt alloys range from 16 MG·Oe to 25 MG·Oe, that is ...
An important use of samarium is samarium–cobalt magnets, which are nominally SmCo 5 or Sm 2 Co 17. [104] They have high permanent magnetization, about 10,000 times that of iron and second only to neodymium magnets. However, samarium magnets resist demagnetization better; they are stable to temperatures above 700 °C (1,292 °F) (cf. 300–400 ...
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.
These magnets are cheaper, lighter, and stronger than samarium–cobalt magnets. However, they are not superior in every aspect, as neodymium-based magnets lose their magnetism at lower temperatures [52] and tend to corrode, [53] while samarium–cobalt magnets do not. [54]
Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.
Samarium–cobalt magnets are made from an alloy of samarium and cobalt, known for their high magnetic strength, excellent temperature stability and resistance to demagnetization. [4] They are often used in applications requiring powerful and stable magnets, such as in motors , aerospace , military equipment, and high-temperature environments.
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This magnetic energy value is about 18 times greater than "ordinary" ferrite magnets by volume and 12 times by mass. This magnetic energy property is higher in NdFeB alloys than in samarium cobalt (SmCo) magnets, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend ...