“…These diagrams are attractive since the FORC distribution is expected to provide detailed information of the interaction field and its effects in particle assemblies 1 and under some circumstances, they allow to reconstruct the intrinsic properties of fine particle systems 26 . In non-interacting particle assemblies, the FORC diagram shows a single narrow distribution, or ridge, along the axis and in this case, it represents the intrinsic coercive field distribution (CFD) 14 , 19 , 27 , 28 . However, in assemblies of interacting particles, the interaction field modifies the width of the CFD, hereafter referred to as , and leads to a second ridge along the axis, known as the interaction field distribution (IFD), whose width, , has been shown to vary with the strength of the interaction field 1 , 19 , 26 , 27 , 29 , 30 .…”