Reversal in individual and interacting NPs

Magnetization reversal in isolated and interacting single-domain nanoparticles.
H. Kesserwan, G. Manfredi, J.-Y. Bigot, and P.-A. Hervieux
Phys. Rev. B 84, 172407 (2011)

Relaxation times for isolated NPs (circles) and interacting NPs for different interparticle distances: d = 9.6 nm (squares), d = 11.8 nm (triangles), and d =16.6 nm (stars). The occupation probability is p = 0.5. The damping constant is α = 1.