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The Spherical Model of a Ferromagnet

Berlin, T. H., Kac, M.·1952·Physical Review

Abstract

A mathematical model, the spherical model, of a ferromagnet is described. The model is a generalization of the Ising model; and one-, two-, and three-dimensional lattices of infinite extent can be extensively discussed. A three-dimensional lattice shows ferromagnetic behavior and provides a statistical model of the Weiss phenomenological theory. The limiting free energy appears in a form which contains two of the essential features of the exactly known Ising model results in one and two dimensions. This suggests the probable form of the limiting free energy for the three-dimensional Ising model. A simplified model, the Gaussian model, is briefly discussed because this model also contains some of the significant features of the Ising model. However, the Gaussian model, unlike the spherical model, is not defined for all temperatures.

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Metadata

Authors
Berlin, T. H., & Kac, M.
Venue
Physical Review
Published
1952-06-15
Volume
86
Issue
6
Pages
821-835
ISSN
0031-899X (ISSN-L)
OpenAlex
W2088593317
Cited by
1,027
References
0
FWCI
2.13
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The Spherical Model of a Ferromagnet. https://app.cochat.ai/papers/10.1103/physrev.86.821
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Berlin, T. H., & Kac, M. (1952). The Spherical Model of a Ferromagnet. Physical Review. https://doi.org/10.1103/physrev.86.821

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.