Numerical simulation of random magnetic anisotropy with solid magnetization grains

作者：Lee S J; Sato S; Yanagihara H; Kita E^*; Mitsumata C

来源：Journal of Magnetism and Magnetic Materials, 2011, 323(1): 28-31.

DOI：10.1016/j.jmmm.2010.08.015

• Random magnetic anisotropy
• Micromagnetic simulation
• Single domain
• Coercive force
• Exchange interaction

Random anisotropy model (RAM) was investigated by means of numerical simulation. Magnetization of magnetically interacting grains with randomly oriented uniaxial anisotropy was calculated using the Landau-Lifshitz-Gilbert equation where the magnetization in a particular grain is assumed to align in the same direction (single spin model). Calculations were carried out for 10 x 10 x 10 three dimensional cells changing cell sizes from 5 to 25 nm. The relation between coercive forces and grain sizes was obtained to

• 出版日期2011-1