Abstract
The present study investigates the potential curves of linear chainlike clusters which are composed of secondary magnetic particles. The orientational distributions of the magnetic moments of the primary particles within the secondary particles are also clarified by means of the usual Monte Carlo method. The results obtained here can be summarized as follows. For the parallel arrangement, in which one cluster lies just beside the other, repulsive forces act between clusters and attractive forces do not arise for any cluster-cluster separation. On the other hand, for the staggered arrangement, in which one cluster is shifted relative to the other in the saturating field direction by the radius of secondary particles, attractive forces do act between clusters at short range. These forces become stronger as the clusters become longer and as the size of secondary particles increases. Although there is a potential barrier for the staggered arrangement, the height of the barrier is almost constant, irrespective of cluster length.
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