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A non-classical van der Waals loop: Collective variables method

Keywords: Van der Waals loop , non-classical critical behavior , scalar order parameter

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Abstract:

The equation of state is investigated for an Ising-like model in the framework of collective variables method. The peculiar feature of the theory is that a non-classical van der Waals loop is obtained. The results are compared with ones of a trigonometric parametric model, in terms of normalized magnetization, M, and field, H.

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