1959/02/15 by Michael E. Fisher · 7 citations
Physics and Astronomy · Computer Science · #Theoretical and Computational Physics #Complex Network Analysis Techniques #Topological and Geometric Data Analysis #Ising model #Spins #Antiferromagnetism #Physics #Square-lattice Ising model #Condensed matter physics #Spin (aerodynamics) #Thermodynamics
paper · doi:10.1103/physrev.113.969
openalex publication_date 1959/02/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/30
The "star-triangle" and "decoration" transformations are generalized so as to apply to arbitrary mechanical systems coupled to the spins of a standard Ising net. This leads to exact solutions for further plane Ising nets and also for lattices in which the spins on alternate sites have a magnitude greater than S=(1)/(2). A general class of antiferromagnetic Ising models is constructed; exact closed expressions can be derived for all the thermodynamic and magnetic properties of these models in an arbitrary magnetic field.The magnetizations and susceptibilities of Ising nets in which different spins have different magnetic moments are investigated and a valuable relation between the susceptibilities of the honeycomb and triangular lattices is derived. It is shown how correlation functions involving a given spin can be expressed in terms of correlations involving the nearest-neighbor spins instead.