Thermodynamics of the Heisenberg spin systems on a triangular lattice: application to 3He films

The thermodynamics of two-dimensional Heisenberg ferro- and antiferromagnets with spin 1 2 on a triangular lattice is theoretically investigated. The employed method is formulated in terms of short-range order and does not imply long-range order in the system. The theory provides an analytical descr...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2000-07, Vol.284, p.232-233
Main Authors: Antsygina, T.N., Chishko, K.A.
Format: Article
Language:English
Subjects:
2D Heisenberg magnet
2D helium
3He 2D
Heat capacity
Susceptibility
Triangular lattice
Online Access:Get full text
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Summary:The thermodynamics of two-dimensional Heisenberg ferro- and antiferromagnets with spin 1 2 on a triangular lattice is theoretically investigated. The employed method is formulated in terms of short-range order and does not imply long-range order in the system. The theory provides an analytical description of thermodynamic functions in the whole temperature region. The results are used to interpret experimental data on heat capacity and susceptibility of a 2D solid 3He layer adsorbed on graphite. It is shown that in the ferromagnetic regime the pure Heisenberg behavior of 2D solid 3He occurs and the theory is in excellent agreement with the experimental data at all temperatures.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)02466-7