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2. Permeability (electromagnetism) - Wikipedia

   en.wikipedia.org/wiki/Permeability...

   Scientists. v. t. e. In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter μ. It is the ratio of the magnetic induction to the magnetizing field as a function of the field in a material.

3. Superconducting magnet - Wikipedia

   en.wikipedia.org/wiki/Superconducting_magnet

   Superconducting magnet. Schematic of a 20-tesla superconducting magnet with vertical bore. A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger ...

4. Rare-earth magnet - Wikipedia

   en.wikipedia.org/wiki/Rare-earth_magnet

   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. The magnetic field typically produced by rare-earth ...

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6. 'Glad I'm home': Former Marine Paul Whelan speaks out after ...

   www.aol.com/news/im-glad-im-home-im-101349372.html

   The former Marine who spent more than 2,000 days in Russian custody spoke out after a historic, multi-country prisoner swap allowed him and three other to return to the U.S. Evan Gershkovich, Paul ...

7. Remanence - Wikipedia

   en.wikipedia.org/wiki/Remanence

   Remanence or remanent magnetization or residual magnetism is the magnetization left behind in a ferromagnetic material (such as iron) after an external magnetic field is removed. [ 1] Colloquially, when a magnet is "magnetized", it has remanence. [ 2] The remanence of magnetic materials provides the magnetic memory in magnetic storage devices ...