The effect of easy axis deviations on the magnetic property of Co nanowire.

Abstract

The 3d transition metals such as iron, cobalt, and their alloys bear high saturation magnetization $(M_{s})$ and high Curie temperatures $(T_{C})$, which are necessary for the giant energy product and good thermal stability, respectively. For the nanowire of 3d transition metals, such as Co nanowires, the effective anisotropy field can be as much as 16.5 kOe by combining the shape anisotropy and magnetocrystalline anisotropy. However, such high coercivity has never been achieved, because there are much defects and the easy axis deviation from the length direction for the nanowires. Therefore, in this study, we investigate the influence of the defects and deviation of easy axis on the coercivity and magnetization reversal process via 3D micromagnetic simulations.