"Phase" diagram of Izing and Heisenberg cubic clusters
Abstract
We have studied the ground state of a simple cubic magnetic cluster, which contains a spin s at each corner site. The ground state of such cluster depends on the competition between nearest, nextnearest and nextnextnearestneighbor exchange interactions. We have calculated the "phase" diagrams for the Izing clusters with s=1/2;1;3/2;5/2;\infty and for the Heisenberg clusters with s=1/2 and s=1. We have found that the "phase" diagram is remarkably independent on the s value. It is important also that the Izing "phase" diagram can be used as a rough approximation for the Heisenberg model.
 Publication:

arXiv eprints
 Pub Date:
 December 2001
 arXiv:
 arXiv:condmat/0112475
 Bibcode:
 2001cond.mat.12475K
 Keywords:

 Materials Science
 EPrint:
 6 pages, 5 figures