MAGNETOSTRICTIVE CRYSTALLINE ENERGY OF DISLOCATIONS IN NI SINGLE CRYSTALS AND ANISOTROPY OF APPROACH TO SATURATION

Recent micromagnetic calculations have shown that magnetostrictive interactions of internal stresses with the magnetization produce an additional magnetocrystalline energy. In cubic crystals the additional anisotropy energy processes orthorhombic symmetry. The crystalline energy induced by plastic deformation in Ni single crystals (oriented for single glide) has been investigated through an analysis of the anisotropy of the approach to saturation. Measurements were carried out on cylindrical disks for different applied fields and several degress of deformation. In particular in the (111)-plane the plastically deformed disks show a twofold and a fourfold symmetry axis in addition to the sixfold symmetry axis of the ideal crystal. © 1968 The American Institute of Physics.