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The Relationship Between Surface Magnetism And Remanence
2024-09-30
Magnetic field refers to the magnetic induction intensity at a certain point on the surface of a magnet, measured in Gauss (Gs) or Tesla (T). Residual magnetism refers to the magnetic induction intensity retained within a ferromagnetic material when it is magnetized to saturation by an external magnetic field and then gradually reduced to zero. Its full name is residual magnetic induction intensity (Br), and the unit is also Gauss (Gs) or Tesla (T).
The relationship between surface magnetism and remanence
Residual magnetism to some extent determines the surface magnetism of a magnet, but the surface magnetism is also influenced by the shape, size, and magnetization mode of the magnet. Two magnets with identical shape, performance, and size, the one with higher residual magnetism has stronger surface magnetism. Two magnets with different shapes, properties, and sizes cannot simply determine the magnitude of residual magnetism based on the height of the magnetic field.
Measurement methods for surface magnetism and remanence
Gaussian meters (also known as Tesla meters) are commonly used to measure magnetic fields, with the reading unit of a Gaussian meter being either Gauss (Gs) or Millitese (mT). The Hall sensing elements on Gaussian meters from different manufacturers are different, resulting in different measurements of the magnetic field for the same magnet. In addition, it should be noted that the Gaussian measurement standards used in different countries are different.
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