Abstract

A detailed description of the ground state of a face-centered cubic antiferromagnetic system with Ising interactions is followed by an investigation of the low-temperature thermodynamic properties by means of a power series expansion of the partition function about $T=0$ \ifmmode^\circ\else\textdegree\fi{}K. This expansion has been found to be possible even though the ground state is degenerate because of the existence of a substantial amount of "partial long-range order." Expressions for the zero-field magnetic susceptibility and the specific heat are derived.

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