TY - JOUR
T1 - A ferroelectric polarization contribution from defect dipoles in acceptor Aurivillius oxide, (Na,Bi)0.47(Li,Ce)0.03Bi 2Ta1.97Sc0.03O8.97
AU - Long, Changbai
AU - Fan, Huiqing
AU - Li, Mengmeng
PY - 2013/11/4
Y1 - 2013/11/4
N2 - Double-loop-like characteristic was detected in acceptor Aurivillius ceramic, (Na,Bi)0.47(Li,Ce)0.03Bi2Ta 1.97Sc0.03O8.97 (NBTO-LiCeSc-0.03) due to the restoring force provided by defect polarization (PD). The P D was associated with non-centric distributing defect dipoles [(ScTa″-VO••) ×], which was verified by impedance spectroscopy measures. Interestingly, the PD could be reoriented with high external electric field at very low frequency, which contributed to the significant enhancement of the polarization of NBTO-LiCeSc-0.03. Air or O2 annealing led to the degradation of the polarization owing to high leakage current and the strong "pinning" effects of space charge and charged defect complexes [e.g., (ScTa″-OO•)′].
AB - Double-loop-like characteristic was detected in acceptor Aurivillius ceramic, (Na,Bi)0.47(Li,Ce)0.03Bi2Ta 1.97Sc0.03O8.97 (NBTO-LiCeSc-0.03) due to the restoring force provided by defect polarization (PD). The P D was associated with non-centric distributing defect dipoles [(ScTa″-VO••) ×], which was verified by impedance spectroscopy measures. Interestingly, the PD could be reoriented with high external electric field at very low frequency, which contributed to the significant enhancement of the polarization of NBTO-LiCeSc-0.03. Air or O2 annealing led to the degradation of the polarization owing to high leakage current and the strong "pinning" effects of space charge and charged defect complexes [e.g., (ScTa″-OO•)′].
UR - http://www.scopus.com/inward/record.url?scp=84889867974&partnerID=8YFLogxK
U2 - 10.1063/1.4829267
DO - 10.1063/1.4829267
M3 - 文章
AN - SCOPUS:84889867974
SN - 0003-6951
VL - 103
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 19
M1 - 192908
ER -