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Magnetic field of a typical refrigerator magnet: 0.4824 m 2 ⋅A [7] Neodymium-iron-boron (strongest grade) disc the same size as a US Penny 10 0: 1.17 m 2 ⋅A [9] Neodymium-iron-boron N35 magnet of 1 cubic centimeter in volume 1.42 m 2 ⋅A [9] Neodymium-iron-boron N52 magnet of 1 cubic centimeter in volume 10 3: 5.937 × 10 3 m 2 ⋅A [7]
These are used to make neodymium magnets. The strength of neodymium magnets is the result of several factors. The most important is that the tetragonal Nd 2 Fe 14 B crystal structure has exceptionally high uniaxial magnetocrystalline anisotropy (H A ≈ 7 T – magnetic field strength H in units of A/m versus magnetic moment in A·m 2).
Neodymium alloys are used to make high-strength neodymium magnets, which are powerful permanent magnets. [11] These magnets are widely used in products like microphones, professional loudspeakers, in-ear headphones, high-performance hobby DC electric motors, and computer hard disks, where low magnet mass (or volume) or strong magnetic fields ...
Download as PDF; Printable version ... because I want to add an external link to a great magnet pull-strength calculator I found at the KJ site. ... N35,N38,N40,N42 ...
Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m 2]. [1] One tesla is equal to 10 4 gauss. Magnetic field drops off as the inverse cube of the distance ( 1 / distance 3 ) from a dipole source. Energy required to produce laboratory magnetic fields increases with the square of magnetic field. [2]
In magnetics, the maximum energy product is an important figure-of-merit for the strength of a permanent magnet material. It is often denoted ( BH ) max and is typically given in units of either kJ/m 3 (kilojoules per cubic meter, in SI electromagnetism) or MGOe (mega- gauss - oersted , in gaussian electromagnetism ).
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