تقرير
Aging of poled ferroelectric ceramics due to relaxation of random depolarization fields by space-charge accumulation near grain boundaries
| العنوان: | Aging of poled ferroelectric ceramics due to relaxation of random depolarization fields by space-charge accumulation near grain boundaries |
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| المؤلفون: | Genenko, Yu. A., Glaum, J., Hirsch, O., Kungl, H., Hoffmann, M. J., Granzow, T. |
| المصدر: | Physical Review B 80, 224109 (2009) |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | Migration of charged point defects triggered by the local random depolarization field is shown to plausibly explain aging of poled ferroelectric ceramics providing reasonable time and acceptor concentration dependences of the emerging internal bias field. The theory is based on the evaluation of the energy of the local depolarization field caused by mismatch of the polarizations of neighbor grains. The kinetics of charge migration assumes presence of mobile oxygen vacancies in the material due to the intentional or unintentional acceptor doping. Satisfactory agreement of the theory with experiment on the Fe-doped lead zirconate titanate is demonstrated. Comment: theory and experiment, 22 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.80.224109 |
| URL الوصول: | http://arxiv.org/abs/0912.3382 |
| رقم الأكسشن: | edsarx.0912.3382 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.80.224109 |
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