Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Blocking temperature in magnetic nano-clusters   A recent study of nonextensive phase transitions in nuclei and nuclear
clusters needs a probability model compatible with the appropriate Hamiltonian.
For magnetic molecules a representation of the evolution by a Markov process
achieves the required probability model that is used to study the probability
density function (PDF) of the order parameter, i.e. the magnetization. The
existence of one or more modes in this PDF is an indication for the
superparamagnetic transition of the cluster. This allows us to determine the
factors that influence the blocking temperature, i.e. the temperature related
to the change of the number of modes in the density. It turns out that for our
model, rather than the evolution of the system implied by the Hamiltonian, the
high temperature density of the magnetization is the important factor for the
temperature of the transition. We find that an initial probability density
function with a high entropy leads to a magnetic cluster with a high blocking
temperature.

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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th