Browsing by Author "Bury, Peter"

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    Elastic stiffness constants of PZN-4.5%PT single crystal influenced by DC bias electric field applied at various directions to prototypic crystal symmetry
    (Taylor & Francis Ltd, 2005-01-01) Hána, Petr; Burianová, Lidmila; Zhang, Shu Jun; Shrout, Thomas Richard; Furman, Eugene L.; Ryzhenko, Volodymyr; Bury, Peter
    The purpose of this work was to characterize an influence of the electric bias field on the elastic stiffness constants of important and unusual piezoelectric material Lead Zinc Niobate-Lead Titanate (PZN-PT). The longitudinal and transverse mode of sound propagation in single crystals containing 4.5% PT were studied. The influence of electric field, which poles the sample, is investigated by the pulse-echo sound propagation technique. From these measurements, the values of complex elastic stiffness constants are evaluated at different poling conditions with different frequencies for longitudinal and sheer excitations. Crystal cuts [001], [110] and [111] served for measurements of the elastic stiffness constants under application of the electric field. Aspects of field-induced phase transitions in PZN-4.5%PT single crystals at room temperature are discussed. Hysteretic behavior has an influence on attenuation and velocity of ultrasound.