On a New Theory of the Magnetization Curve of Plastically Deformed Nickel Single Crystals

A new theory of the magnetization process in plastically deformed nickel single crystals of single slip orientation is outlined. It is based on the interaction between the (101)180°-domain walls and the three types of primary edge dislocation dipole and multipole arrangements dominating in stage I, in the transition region and in stage II of the stressstrain curve, respectively, i . e . the [121]-dipole bundles, the rope-like clusters of such bundles extended along [121] , and the [121] -multipole walls, all having [T01]-Burgers-vectors. In increasing magnetic fields the primary edge dislocation arrangements are shown to be capable to glide to new obstacles under the pressure of the (101) -180°-domain walls which will follow them and whose segments at the same time start to vault themselves cylindrically or pillow-shapedly between these dislocation barricades, finally overcoming them at the coercive force by Barkhausen jumps.