Table 1: The summary of parameters of samples: the samples are the powdered ribbons, the self-demagnetization factor , and the mass density  g/cm3.

CompositionExternal magnetic field (T)Optimal wheel speed (m/s)
( /kg)
(T) (kA/m) (kA/m)(BH)max (kJ/m3)

Nd16Fe76B8/
40% wt. Fe65Co35
0.03489.20.930.61505383128
Nd16Fe76B8/
40% wt. Fe65Co35
0.323092.30.990.63675504140