An optimum composition range （29％≤x≤31%） of 〈001〉 oriented (1_x)P b(Mg1/3Nb2/3)O3_xPbTiO3(PMNT) crystals was ascertain ed for multilayer actuator applications, which exhibited high_strain and low_hyster esis behavior. A nearby -2kV/cm negative E_field can be applied to PMNT ferr oele ctric samples with low hysteresis. Forty_layer PMNT strain actuators with indiv idua l element sizes of 7mm×7mm×0.7mm were fabricated from their optimum composit ions, with displacements of 38.1μm at E_fields from -1.5 to 10 kV/cm. Wh en a 4 kg load was added to the PMNT multiplayer actuators, the displacements we re decreased to 34 μm.