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2. Ferrite (magnet) - Wikipedia

   en.wikipedia.org/wiki/Ferrite_(magnet)

   The maximum magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30–160 kiloampere turns per meter (400–2000 oersteds). [33] The density of ferrite magnets is about 5 g/cm 3. The most common hard ferrites are: Strontium ferrite Sr Fe 12 O 19 (Sr O · 6 Fe 2 O

3. 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 ...

4. Barium ferrite - Wikipedia

   en.wikipedia.org/wiki/Barium_ferrite

   Barium ferrite, abbreviated BaFe, BaM, is the chemical compound with the formula BaFe. 12O. 19 (BaO : 6 Fe. 2O. 3 ). [1] This and related ferrite materials are components in magnetic stripe cards and loudspeaker magnets. BaFe is described as Ba2+.

5. Ferromagnetism - Wikipedia

   en.wikipedia.org/wiki/Ferromagnetism

   Permanent magnets are made from hard ferromagnetic materials (such as alnico) and ferrimagnetic materials (such as ferrite) that are subjected to special processing in a strong magnetic field during manufacturing to align their internal microcrystalline structure, making them difficult to demagnetize. To demagnetize a saturated magnet, a ...

6. Magnetic core - Wikipedia

   en.wikipedia.org/wiki/Magnetic_core

   Magnetic core. A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, loudspeakers, magnetic recording heads, and magnetic assemblies.

7. Ferrite core - Wikipedia

   en.wikipedia.org/wiki/Ferrite_core

   Ferrite core. In electronics, a ferrite core is a type of magnetic core made of ferrite on which the windings of electric transformers and other wound components such as inductors are formed. It is used for its properties of high magnetic permeability coupled with low electrical conductivity (which helps prevent eddy currents).