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RESEARCH PRODUCT
Superparamagnetism in Ising Clusters
Jussi TimonenJuha MerikoskiM. Manninensubject
PhysicsCondensed Matter::Materials ScienceMagnetizationCondensed matter physicsFerromagnetismCoordination numberTheoretical modelsCurie temperatureCondensed Matter::Strongly Correlated ElectronsIsing modelSuperparamagnetismdescription
Recent experiments on small ferromagnetic clusters have inspired introduction of a number of seemingly quite different theoretical models. We shall argue that all these models show superparamagnetic behaviour above the blocking temperature but below the Curie temperature. In particular, we shall show that Ising clusters display superparamagnetism and introduce a simple correction to the usual tank behaviour of magnetisation which has to be included for very small clusters. We also discuss the dependence of magnetisation on coordination number.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-01-01 |