Plastic deformation results in a significant increase in the
dislocation density and changes the domain wall energy at some
pinning sites. It should be noted that the effect of plastic
deformation on the MBN signals is more complicated than that
of elastic deformation [85–87]. Such complexity is especially
reflected by some contradictory claims reported regarding the
dependence of MBN signals on plastic deformation. For example,
most studies [88–93] reported a continuous decrease of the
Barkhausen noise as the plastic strain increases,while in the
other studies [73,94–97] an increase at the low plastic strain
followed by a decrease at the high plastic strain was observed.