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<正>Pt-based relaxor ferroelectric single crystals such as Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT)and Pb(Zn1/3Nb2/3)O3-Pb TiO3(PZN-PT),were reported as a novel piezoelectric materials with high properties at 1990's,which have