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The spontaneous electric polarization Ps has been measured for Gd2(MoO4)3 over the temperature range from 4.2 °K to the Curie point. Near 4 °K the maximum Ps is slightly less than 0.29 μC/cm2 with a very low temperature coefficient. An electric field enforced phase transition from paraelectric to ferroelectric at temperatures just above zero-field Tc demonstrates the first-order nature of the phase change. Better agreement was found near Tc between Ps and the relation (T − T1)1/3 than between Ps and a Landau-type function.
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Sawaguchi et al. (1973) studied this question.
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