Second- to first-order transition in two coupled antiferromagnetic rings
Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, P.R. China
Corresponding author: a firstname.lastname@example.org
Revised: 9 February 2006
Published online: 28 June 2006
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.
PACS: 75.10.Jm – Quantized spin models / 75.10.Pq – Spin chain models / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006