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Published in:
10-06-2015
Defect-dipole alignment and strain memory effect in poled Li doped (Bi0.5Na0.4K0.1)0.98Ce0.02TiO3 ceramics
Published in: Journal of Materials Science: Materials in Electronics | Issue 12/2015
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Abstract
Asymmetric ferroelectric hysteresis (P–E) loops and strain hysteresis (S–E) curves are detected in poled-aged Li doped (Bi0.5Na0.4K0.1)0.98Ce0.02TiO3 ceramics at room temperature. Temperature dependence of electrical and structural analysis is used to study the stability of electrically induced long-range ferroelectric order. Interestingly, this asymmetric characteristic can sustain at 80 °C ≤ T ≤ 90 °C, where the ferroelectric and non-ergodic relaxor phase coexist. Our results suggest that the preferentially reoriented defect dipoles have the pinning effect on temperature- and electric field- induced phase transition between long-range ferroelectric and relaxor.