Clusters in a magnetic toy model for binary granular piles
  Results on a generalized magnetically controlled ballistic deposition (MBD) model of granular piles are reported in order to search for the effect of "spin flip" probability q in building a granular pile. Two different regimes of spin cluster site distributions have been identified, a border line $q_c(\beta J)$ where J is the interaction potential strength. 
Kamil Trojan and Marcel Ausloos