Surface-induced reduction of the switching field in nanomagnets
arXiv:2107.11407 · doi:10.1016/j.jmmm.2021.168966
Abstract
Magnetization reversal in a many-spin nanomagnet subjected to an rf magnetic field, on top of a DC magnetic field, is studied by numerically solving the system of coupled (damped) Landau-Lifshitz equations. It is demonstrated that spin-misalignment induced by surface anisotropy favors switching with a DC magnetic field weaker than the Stoner-Wohlfarth switching field, for optimal intensities and frequencies of the rf field.
7 pages, 6 figures
References in corpus (5)
- Effective anisotropies and energy barriers of magnetic nanoparticles with Neel surface anisotropy
- Effects of spin non-collinearities in magnetic nanoparticles
- Coherent spin relaxation in molecular magnets
- Magnetization reversal and nonexponential relaxation via instabilities of internal spin waves in nanomagnets
- Dynamics of a nanoparticle as a one-spin system and beyond