Zhuwu Yi

1 Introduction Ionic conductors exhibit giant electrostriction in rare-earth-metal-doped CeO2 [1-5], (Y, Nb)-stabilized δ-Bi2O3 [6, 7], LAMOX [8-10], with electrostrictive responses exceeding predictions based on Newnham's scaling law by more than two orders of magnitude recently [11]. The electrostrictive coefficient |Mxx| reaches values above ∼ 10−14 m2 V−2, surpassing those of state-of-the-art PMN- and PZN-based ferroelectrics substantially [7].