Magnetization and Magnetostriction of Hexagonal Cobalt Single Crystals with Internal Stresses

Abstract

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.

Magnetization reversal dependence on effective magnetic anisotropy in electroplated Co–Cu nanowire arrays

“…Regarding the magnetic anisotropy of Co nanowire arrays and their temperature dependence two alternative interpretations are proposed in the literature. In one hand, the magnetoelastic anisotropy energy contribution can play an important role since the nanowires are embedded into the alumina pores and consequently submitted to mechanical stresses 29 . This fact can be especially manifested when measuring at different temperatures due to strain introduced by the different thermal expansion coefficients of metal and surrounding ceramic alumina 30 , as well as by the non-oxidized Al remaining at the bottom of the alumina membrane 31 .…”

Reversible Magnetization Curve and Magnetostriction of Uniaxial Ferromagnetic Crystals with Internal Stresses

“…AAsin '4 + J cos p ) + cos vo(l + 2k) 1 -2kcos tp + r s i n p = 4rk + Brcos p + 4ksin yo.For the discussion of Koster' s experiments(1) the approximation r << 2k sin yO@k + cos QJ is of particular interest. By expanding the square2 Comparison between experimental (full lines) and theoretical (crosses) differential susceptibilities and longitudinal magnetizations.…”