Thermodynamic properties of tetrameric bond-alternating spin chains

Abstract

Thermodynamic properties of a tetrameric bond-alternating Heisenberg spin chain with ferromagnetic-ferromagnetic-antiferromagnetic-antiferromagnetic exchange interactions are studied using the transfer-matrix renormalization group and compared to experimental measurements. The temperature dependence of the uniform susceptibility exhibits typical ferrimagnetic features. Both the uniform and staggered magnetic susceptibilities diverge in the limit $T\to 0$, indicating that the ground state has both ferromagnetic and antiferromagnetic long-range orders. A double-peak structure appears in the temperature dependence of the specific heat. Our numerical calculation gives a good account for the temperature and field dependence of the susceptibility, the magnetization, and the specific heat for Cu(3-Clpy)${}_2$(N${}_3$)${}_2$ (3-Clpy=3-Chloroyridine).

8 pages, 12 figures; Replaced with final version accepted in Phys. Rev. B

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Cited by in corpus (7)

• Thermodynamics of Spin-1/2 AF-AF-F and F-F-AF Trimerized Quantum Heisenberg Chains
• Thermodynamics of spin-1/2 tetrameric Heisenberg antiferromagnetic chain
• Magnetization plateaux, Haldane-like gap, string order and hidden symmetry in a spin-1/2 tetrameric Heisenberg antiferromagnetic chain
• Effects of a space modulation on the behavior of a 1D alternating Heisenberg spin-1/2 model
• Spin nematic states in antiferromagnets containing ferromagnetic bonds
• Magnetic properties of the spin $S=1/2$ Heisenberg chain with hexamer modulation of exchange
• Zero-temperature study of a tetrameric spin-$1/2$ chain in a transverse magnetic field