Abstract

The temperature dependence of the susceptibility of the frustrated two sublattice Ising system is studied in the mean field approximation. The susceptibility of the frustrated and disordered antiferromagnet is found to have a minimum in the er godic phase. The field cooled susceptibility of the strongly frustrated ferrimagnet may depend on the temperature even in the nonergodic phase. Our findings agree qualitatively with the experimental data. PACS numbers: 71.28.+d, 71.27.+a