Rare Earth Magnet Basics / Glossary of Magnet Terms / Residual magnetic flux density (remanence)

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Residual magnetic flux density (remanence)
In the magnetic hysteresis loops showing the magnetic characteristics of a material, the remanence is the value of the flux density remaining when the external field returns from the high value of saturation magnetization to 0. The remanence is also called the residual magnetization. The higher the value, the higher the useable magnetic flux density. The units are the tesla [T] for SI units and the gauss [G] for CGS units and the remanence is expressed as Br. For an isotropic material, the remanence is about 50% to 75% of the saturation magnetization, but for rare earth sintered magnet material, because the easy magnetization axis direction is oriented in the magnetization direction, the remanence is about 95% or more of the saturation magnetization.
  • Rare Earth Magnet Basics
  • About Rare Earth Magnets
  • Magnetization Methods and Characteristics
  • Magnetic Evaluation Test

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