Handbook of Magnetic Measurements

70 Handbook of Magnetic Measurements

We can also see that DW spacing depends on the

length of domain. It is known that losses in silicon steel

depend strongly on the domain width (Figure 2.118b)

due to eddy current loss (Nozawa et al. 1996, O’Handley

2000). Therefore, many technologies were developed,

which improve quality of electrical steel quality by

domain renement (Nozawa et al. 1996). For example,

additional tensile stress is often introduced in electri-

cal steel (by special coating layer) to divide domain into

narrower ones (Figure 2.119a). In another technology

used in the case of grain-oriented steel, the surface ...