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A number of sample applications are discussed in which the change to NdFeB has already been made. One reason for the use of NdFeB is the material's good magnetic values at room temperature. They are of benefit above all in magneto mechanics, since the forces and torques are proportional to the square of remanence B . One weak point of the new material is its low resistance to corrosion and radiation, which necessitates protective measures. Of much greater significance, however, is the sharp drop in coercivity HÂ which occurs with increasing temperature.Â
