Thin domain wall motion

Dynamic domain imaging or Kerr microscopy of low coercivity thin films at MHz domain-switching frequencies allows one to examine domain wall motion in detail. ... 

Figure 6 Scanning Karr image of the magnetization changes in the indirection for a thin-film head having a 1-MHz, 5-mA p-p coil current, and the magnetic domain pattern deduced for this head from the observed domain wall motion. ...

Vacuum domains should appear during the cooling of the Universe if spontaneous violation of SP-symmetry occurs in nature. In addition, contiguous domains should differ from one another by the sign of the SP violation. The domains should be separated by very thin and very heavy walls, the theory of whose motion was developed by Ya.B. and his coauthors. 

In Fig. 103 we have indicated the P field distribution (one of many possible states) around two adjacent thin walls. The field is predominantly up in one of them and predominantly down in the other. Therefore alternate walls often serve as nucleation centers for domain switching taking place in the chevron plane, i.e., for the motion of walls between up and down domains. Such... 

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