Abstract
Polarization hysteresis (P-E) change was investigated as a function of the strength, frequency and cycles of electric field alternating for [001]c, [110]c, [111]c oriented Pb(Mg1/3Nb1/3)O3-0.32PbTiO3 (PMN-0.32PT) single crystals. Under 1.5kV/cm (< Ec), the fatigue rates after 105 cycles were 13%, 16% and 34% for [001]c, [110]c and [111]c orientations, respectively. Under 7.5kV/cm (>Ec), obvious polarization fatigue was presented for [001]c, [110]c, [111]c orientations and the biggest fatigue rate was around ∼70% in [110]c orientations after 105 cycles. The fatigue rate decreased with the increasing of electric field frequency. The influences of crystallographic orientation and electric field strength and frequency on polarization fatigue behavior in PMN-0.32PT single crystals was discussed based on space charge, domain reverse and phase transition process.
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