Prog. Theor. Phys. Vol. 57 No. 1 (1977) pp. 28-41
Thermodynamic Properties of the Frozen System
— Linear Ising Mixture of the “Site Model”
Department of Physics, Nara Medical University, Kashihara, Nara
*Department of Physics, University of Osaka Prefecture, Sakai, Osaka
(Received June 17, 1976)
On the basis of a formalism using distribution functions, thermodynamic properties of the one-dimensional Ising mixture are investigated for the frozen system with atomic short-range order and the annealed system. In addition to magnetic interactions, non-magnetic interactions are taken into account for the nearest-neighbor pairs of atoms. The thermodynamic quantities are calculated exactly in the thermodynamic limit by the use of the transfer matrix method. As typical examples, the two cases, i.e., (i) a mixture composed of a ferromagnetic and an antiferromagnetic material and (ii) an antiferromagnet diluted by a non-magnetic material, are studied. The thermodynamic properties are discussed in connection with atomic short-range order.
DOI : 10.1143/PTP.57.28
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