Abstract
Experimental results on the dependance of coercive field on temperature and deformation, published in an earlier work (Co I 1), are explained theoretically. In the temperature intervals I and III ( T ⩽ 245°C and T ⩾ 340°C) for a centrally oriented single crystal of cobalt, the magnetisation change in the steep section of the magnetisation curve is produced by the combined magnetisation mechanism of “domain wall movements and rotations”. It was found that the coercitive fields is determined by the effect of dislocations on the movement of Bloch walls. On the other hand, the rotation processes are hardly affected by lattice defects on account of the high crystalline anisotropy of cobalt. Yet the contribution of rotational processes to magnetisation is very important for the understanding of coercive field.
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