Micromagnetic modeling of the interaction of single-domain ferromagnetic particles in a nanopowder

Using the mumax3 program, we have shown that the interparticle dipole interaction affects the shape of hysteresis loops in stationary clusters of single-domain iron nanoparticles. We have determined how the magnetic state of nanoparticles changes depending on the thickness of the oxide shell, the distance between the particles, and the presence of particles in the vicinity. The magnetic state of nanoparticles with multidirectional magnetic crystalline anisotropy axes has been calculated at the external magnetic field and dipole fields of neighboring particles.