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Thermodynamics of a mixed quantum-classical Heisenberg model in two dimensions

Leandri, J., Leroyer, Y., Meshkov, S.V., Meurdesoif, Y., Kahn, O., Mombelli, B., and Price, D. (1996) Thermodynamics of a mixed quantum-classical Heisenberg model in two dimensions. Journal of Physics: Condensed Matter, 8 (17). L271-L278. ISSN 0953-8984 (doi:10.1088/0953-8984/8/17/004)

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Abstract

We study the planar antiferromagnetic Heisenberg model on a decorated hexagonal lattice, involving both classical spins (occupying the vertices) and quantum spins (occupying the middle of the links). This study is motivated by the description of a recently synthesized molecular magnetic compound. First, we trace out the spin-1/2 degrees of freedom to obtain a fully classical model with an effective ferromagnetic interaction. Then, using high-temperature expansions and Monte Carlo simulations, we analyse its thermal and magnetic properties. We show that it provides a good quantitative description of the magnetic susceptibility of the molecular magnet in its paramagnetic phase.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Price, Dr Daniel
Authors: Leandri, J., Leroyer, Y., Meshkov, S.V., Meurdesoif, Y., Kahn, O., Mombelli, B., and Price, D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of Physics: Condensed Matter
Journal Abbr.:J. Phys.: Condens. Matter
Publisher:IOP Publishing Ltd
ISSN:0953-8984
ISSN (Online):1361-648X

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