STATISTICS OF A LINEAR PARAMAGNETIC MACROMOLECULE

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Abstract
The partition function of a linear "macromolecule" composed of N paramagnetic atoms subject to the Ising interaction is calculated for an arbitrary N. From the partition function the expressions for the specific heat and the initial paramagnetic susceptibility are obtained. It is shown on the example of the susceptibility that the procedure, customary in statistical mechanics, which consists in using the asymptotic expressions (N→∞) to describe actual physical systems (N very large, but finite) should be used with some caution in the region of very low temperatures.

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