The magnetic dipole-dipole interaction effect on the magnetic hysteresis at zero temperature in nanoparticles randomly dispersed within a plane

Kornogortsev, S., V; Fel'k, V. A.; Li, O. A. Source: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 473 410-415; 10.1016/j.jmmm.2018.10.091 MAR 1 2019

The dipole-dipole interaction effect on the magnetic hysteresis of nanoparticles randomly dispersed within a plane is studied by micromagnetic simulation. The dependence of the coercive field with the concentration of nanoparticles varies from nonlinear and monotonic to non-monotonic dependence with a maximum at a certain concentration. It happens when the ratio of the magnetic anisotropy constant to the maximal dipole energy changes from value much larger than 1 to the value much less than unity.