Influence of Cation Order on the Electric Field-Induced Phase Transition in Pb(Mg1/3Nb2/3)O3-Based Relaxor FerroelectricsJournal of the American Ceramic Society
AbstractThe effect of cation ordering on an electric field-induced relaxor to normal ferroelectric phase transition in Pb(Mg1/3Nb2/3)O3 (PMN)-based ceramics was investigated. Both A-site La doping and B-site Sc doping were found to enhance the chemical ordering in these relaxor ceramics. However, the enhanced chemical orderings showed different impacts on the dielectric and ferroelectric properties in these perovskite materials. The 5% La doping was observed to shift the dielectric maximum temperature (Tmax) to a significantly lower temperature and suppress the electric field-induced transition to a ferroelectric phase. In contrast, the 5% and 10% Sc doping showed little effect on Tmax but strengthened the ferroelectric coupling. The difference is discussed on the basis of cation size and charge imbalance. An electric field-temperature phase diagram is also proposed for the 0.90PMN–0.10Pb(Sc1/2Nb1/2)O3 based on its history dependence of the electric field-induced phase transition.
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Copyright OwnerZhao, et al.
Citation InformationXiaohui Zhao, Weiguo Qu, Hui He, Naratip Vittayakorn, et al.. "Influence of Cation Order on the Electric Field-Induced Phase Transition in Pb(Mg1/3Nb2/3)O3-Based Relaxor Ferroelectrics" Journal of the American Ceramic Society Vol. 89 Iss. 1 (2006) p. 202 - 209
Available at: http://works.bepress.com/xiaoli_tan/67/