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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.
Alnico's anisotropy is oriented along the desired magnetic axis by applying an external magnetic field to it during the precipitate particle nucleation, which occurs when cooling from 900 °C (1,650 °F) to 800 °C (1,470 °F), near the Curie point. There are local anisotropies of different orientations without an external field due to ...
The minesweepers of the Borndiep-class were equipped with mechanic, acoustic and magnetic sweepers. [5] The magnetic sweeper consisted of two cables through which electricity would pulse and as a result would create a magnetic field that would detonate magnetic mines. [6] [7] As acoustic sweeper it had an electric hammer clock that would be ...
The strongest continuous magnetic fields on Earth have been produced by Bitter magnets. The strongest continuous field achieved solely with a resistive magnet is 41.5 tesla as of 22 August 2017 [update] , produced by a Bitter electromagnet at the National High Magnetic Field Laboratory in Tallahassee , Florida .
As built the ships were equipped with a W Mk 3 mod 1 mechanical sweep and either a A X Mk 6B or A X Mk 4V acoustic sweeper. [2] Furthermore, it had a double machine gun of 20 mm. [1] Later, in the 1960s and 1970s, the ships got equipped with a MB 5 magnetic sweeper. [2]
Developed independently in 1984 by General Motors and Sumitomo Special Metals, [3] [4] [5] neodymium magnets are the strongest type of permanent magnet available commercially. [ 1 ] [ 6 ] They have replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as electric motors in cordless ...
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