Temperature dependence of nonlinear susceptibilities in an infinite range interaction model.

We present a model to probe metamagnetic properties in systems with a variable number of interacting spins. Thermodynamic properties such as the magnetization per particle [Formula: see text], linear susceptibility [Formula: see text], and nonlinear susceptibilities [Formula: see text] and [Formula: see text] were calculated. The model produces a different magnetic response for N particles when comparing to N  -  1 particles for small [Formula: see text].