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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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.
|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|