Nonlinear dielectric properties and tunability of 0.9Pb([Mg.sub.1/3], [Nb.sub.2/3])[O.sub.3]-0.1 PbTi[O.sub.3] and Ba([Ti.sub.0.85], [Sn.sub.0.15])[O.sub.3] paraelectrics

The nonlinear dielectric properties of 0.9Pb([Mg.sub.1/3], [Nb.sub.2/3])[O.sub.3].0.1PbTi[O.sub.3] (PMN-PT) and Ba[[Ti.sub.0.85], [Sn.sub.0.15]][O.sub.3] (BTS) paraelectrics are investigated. The results have shown that the nonlinear dielectric properties of PMN-PT are higher than that of BTS.