Negative magnetic susceptibility and nonequivalent ensembles for the mean-field phi(4) spin model
A. CAMPA
•
Ruffo, Stefano
•
H. TOUCHETTE
2007
Periodico
PHYSICA. A
Abstract
We calculate the thermodynamic entropy of the mean-field phi(4) spin model in the microcanonical ensemble as a function of the energy and magnetization of the model.
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