Abstract.
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⊥ and there may exist a critical J⊥* dividing the first-order transition and the continuous transition.
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Li, P., Chen, Y. & Chen, H. Second- to first-order transition in two coupled antiferromagnetic rings. Eur. Phys. J. B 51, 473–476 (2006). https://doi.org/10.1140/epjb/e2006-00255-1
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DOI: https://doi.org/10.1140/epjb/e2006-00255-1