Thermodynamic properties of some S = 1 soliton-bearing and Haldane-like systems

The numerical finite-size technique has been applied to study thermodynamic properties of the S = 1 quasi-one-dimensional magnets CsNiF 3, (CH 3) 4NNiBr 3 (TMNB), (CH 3) 4NNiCl 3 (TMNC) and CsNiCl 3, the latter showing the Haldane gap. The length of chains has been extended up to N ≤ 8 and the succe...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1992-02, Vol.104, p.865-866
Main Authors: Kamieniarz, G., Gerling, R.W., Campana, L.S., Caramico D'Auria, A., Esposito, F., Esposito, U.
Format: Article
Language:English
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Summary:The numerical finite-size technique has been applied to study thermodynamic properties of the S = 1 quasi-one-dimensional magnets CsNiF 3, (CH 3) 4NNiBr 3 (TMNB), (CH 3) 4NNiCl 3 (TMNC) and CsNiCl 3, the latter showing the Haldane gap. The length of chains has been extended up to N ≤ 8 and the successful fitting procedure has been performed to match the parameters of the easy-plane Heisenberg model with single-ion anisotropy. The quantitative agreement with experiment has been found both for the zero-field and the field-dependent properties. An attempt to apply the renormalization-group approach is also put forward for CsNiCl 3.
ISSN:0304-8853
DOI:10.1016/0304-8853(92)90398-8