ANTIFERROELECTRICITY IN LEAD INDIUM NIOBATE

The temperature dependence of the dielectric properties (relative perm ittivity epsilon and polarization P) of the ordered Pb(In1/2Nb1/2)O-3 (PIN) were investigated. By the observation of the P-E double hysteres is loops it was confirmed that the phase below the normal transition t emperature is antiferroelectric for ordered PIN with different orderin g degree of B-site cations. The critical electric field E-cr which ind uces the ferroelectric phase increases rapidly with cooling. With incr easing ordering degree of B-site cation, antiferroelectric transition temperature T-n increases, whereas the Curie-Weiss temperature T-0 dec reases, the maximum value of epsilon at the transition decreases, and the value of \dE(cr)/dT\ increases.