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Article overview
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Thermodynamic Properties of Heisenberg Ferrimagnetic Spin Chains: Ferromagnetic-Antiferromagnetic Crossover | | Shoji Yamamoto
; Takahiro Fukui
; | | Date: |
28 Oct 1997 | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We study thermodynamic properties of the one-dimensional Heisenberg ferrimagnet with antiferromagnetically exchange-coupled two kinds of spins 1 and 1/2. The specific heat and the magnetic susceptibility are calculated employing a modified spin-wave theory as well as a quantum Monte Carlo method. The specific heat is in proportion to $T^{1/2}$ at low enough temperatures but shows a Schottky-like peak at mid temperatures. The susceptibility diverges as $T^{-2}$. We reveal that at low temperatures the model is regarded as a ferromagnet, while at mid temperatures it behaves like a gapped antiferromagnet. | | Source: | arXiv, cond-mat/9710291 | | Services: | Forum | Review | PDF | Favorites | |
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