Magnetization reversal in cobalt nanowires with combined magneto-crystalline and shape anisotropies

In the present study, we present new experimental and calculated results of Co nanowires synthesized by the solvothermal method. The coercivity of 8.7 kOe and the energy product of 31.4 MGOe were obtained for wires of average diameters of 20 nm and average lengths of 200 nm. The experimental and numerical results of nanowires were discussed. Micromagnetic simulations were conducted to study the dependence of the magnetic properties on the nanowire aspect ratios, diameters, and various magneto-crystalline easy axis deviation angles from the long axis of Co nanowires. The calculation with a magneto-crystalline easy axis deviations from long axis show a better accordance with experimental results. The state graphs for reversal modes versus the magneto-crystalline easy axis deviation angles in Co nanowires were presented.