Li, P. F.; Chen, Y. G.; Chen, H. - In: The European Physical Journal B - Condensed Matter and … 51 (2006) 4, pp. 473-476
We numerically investigate an S=1/2 spin model, in which two dimerized antiferromagnetic rings interact with each other ferromagnetically. It is shown that the order of the magnetoelastic transition is strongly affected by the interring coupling J<Subscript>⊥</Subscript> and there may exist a critical J<Subscript>⊥</Subscript> <Superscript>*</Superscript>...</superscript></subscript></subscript>