ISSN:
1434-6036
Keywords:
PACS. 75.50.Xx Molecular magnets – 75.10.Jm Quantized spin models – 75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: For many spin systems with constant isotropic antiferromagnetic next-neighbour Heisenberg coupling the minimal energies E min(S) form a rotational band, i.e. depend approximately quadratically on the total spin quantum number S, a property which is also known as Landé interval rule. However, we find that for certain coupling topologies, including recently synthesised icosidodecahedral structures this rule is violated for high total spins. Instead the minimal energies are a linear function of total spin. This anomaly results in a corresponding jump of the magnetisation curve which otherwise would be a regular staircase.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10051-001-8701-6
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