Measurements of magnetization and magnetostrictive changes of the length were carried out on a plastically deformed cobalt single crystal a t low magnetic fields. The results are in good agreement with theoretical calculations by Kronmuller et al. [l]. From this it is concluded that the magnetization processes within the closure structure of ferromagnetic domains at the crystal surface have no noticeable influence on the magnetization compared with the processes in the crystal volume.
Die Magnetisierung und die magnetastriktive Liingeniinderung stabformiger Nickeleinkristalle mit -Xi single crystals at various temperatures and with various degrees of plastic deformation. The results show that the magnetization at low magnetic fields takes place simultaneously by domain wall displacements and rotational processes; magnetization and magnetastriction obey the Reyleigh law. The contribution of the wall displacements to the initial susceptibility is proportional to (tt J -1 ; the contribution of the rotational processes is proportional to (T -T~) -~ and amounta to about 15 to 30% of the total susceptibility. Here (Tt o ) represents the hardening of the crystals. The stress anisotropy may be obtained from the measurements. which yields information concerning the dislocation arrangement. The results of an investigation of irreversible magnetization processes are also reported.
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