2011•Chinese Rare EarthsRequires access

Research on the Approximate Universal Formula of Magnetic Properties of NdFeB Magnet

Ying Ma

Abstract

To investigate the approximate universal law of magnetic properties of NdFeB magnet,the demagnetization curves of NdFeB magnets with different properties under different temperature are normalized.Results showed that the demagnetization curves exhibited the approximate universality and the dependences of temperature on intrinsic coercive force and remanence were similar,from which the approximate universal mathematical expressions of demagnetization curves of NdFeB magnet under different temperature were derived.The calculated demagnetization curves under different temperature have good agreements with the experimental results.The formula can be used to estimate the magnetic loss of NdFeB magnet under different temperature.

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Key concepts: Neodymium magnet, Demagnetizing field, Magnet, Remanence, Materials science, Condensed matter physics, Coercivity, Universality (dynamical systems)