LAUSR

Abstract Solid solutions of lead zirconate magnesium niobate Pb 1− x La x [Zr 0.9 Mg (0.1+ x )/3 Nb (0.2− x )/3 ]O 3 (0⋜ x ⋜0.05) doped with lanthanum ions were prepared. By the analysis of temperature-driven transitions and experiments in strong electric fields, we determined the concentration and temperature intervals of the existence of antiferroelectric and ferroelectric states. X-ray diffraction proved that the antiferroelectric phase, stable with х >0.0175 at T C > Т >45 °C (during the cooling process at zero field), underwent a monoclinic distortion of perovskite cell and showed a disturbed translational symmetry of the orthorhombic superstructure. The energy storage density and electrostrictive strain were measured in the process that induces the antiferroelectric⇄ferroelectric phase transitions.