Dependence of high electric-field-induced strain on the composition and orientation of Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals

✍ Scribed by Zuyong Feng; Haosu Luo; Yiping Guo; Tianhuo He; Haiqing Xu

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 159 KB
• Volume: 126
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/s0038-1098(03)00136-4

✦ Synopsis

Electric-field-induced strain behavior of ð1 2 xÞPb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMNT) crystals with different orientations and compositions was investigated for use as electromechanical actuators. Crystallographically, high strains with low hysteresis were achieved for k001l oriented rhombohedral crystals ð29% # x # 31%Þ near a morphotropic phase boundary, rather than k110l and k111l. Domain instability could explain inferior strain levels and large hysteresis for k110l and k111l oriented crystals. Ultrahigh strain levels up to 1.8% could be achieved for k001l oriented PMNT crystals, being related to an E-field induced phase transition. 2 2 kV/cm negative E-field can be applied to PMNT ferroelectric material with low hysteresis. High strain with low hysteresis makes PMNT crystals promising candidates for high performance solid-state actuators.