Abstract
A random Ising magnet with ferro- and antiferromagnetic interactions JA and JB, is treated by the method of a modified cumulant expansion regarding the effective field and its square as random variables. Phase boundaries between the glass-like phase (GLP) and the ferro- and the antiferromagnetic phases, are determined. It is shown that the susceptibility and the specific heat have cusps at the transition temperature TG between the glass-like phase and paramagnetic phase.
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