Magnetic hysteresis Return point memory Preisach operator Mean-field model
Closure of minor hysteresis loops is studied using random coercivity Ising model with antiferromagnetic interactions. Mean-field modeling reveals a critical phenomenon in the hysteretic behavior associated with the loss of closure and the onset of minor loop reptations. Similar results are demonstrated numerically for the random coercivity Ising model with antiferromagnetic nearest-neighbor interactions.