2007/05/28 by Jean-Guy Caputo, Yuri Gaididei, Volodymyr P. Kravchuk +2 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic Properties of Alloys #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.76.174428
published as Phys. Rev. B 76, 174428 (2007) · ReVTeX, 14 pages, 6 figures
arxiv created 2007/05/28 · openalex publication_date 2007/11/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the effective anisotropy induced in thin nanomagnets by the nonlocal demagnetization field (dipole-dipole interaction). Assuming a magnetization independent of the thickness coordinate, we reduce the energy to an inhomogeneous on-site anisotropy. Vortex solutions exist and are ground states for this model. We illustrate our approach for a disk and a square geometry. In particular, we obtain good agreement between spin-lattice simulations with this effective anisotropy and micromagnetic simulations.