کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438879 1398188 2017 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The ac sub-coercive-field dielectric resonses of (Pb, Sr)TiO3 films at low temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The ac sub-coercive-field dielectric resonses of (Pb, Sr)TiO3 films at low temperature
چکیده انگلیسی
The evolutions of the ac sub-coercive-field dependent dielectric responses and ferroelectric properties with the temperature in (Pb,Sr)TiO3 (PST) films were investigated in this study. It was found that the remanent polarization (Pr) and coercive field (Vc) monotonically increase with the decreasing temperature, indicating that the ferroelectric domain wall (DW) motion is a thermal-driven processes. Then, ac sub-coercive-field dependent dielectric responses were analyzed in the frame of the hyperbolic law. The contributions of intrinsic lattice, reversible process of DW motion, and irreversible DW motion to sub-coercive-field dielectric responses were extracted. It is shown that the contribution of intrinsic lattice monotonically increases at higher temperatures due to ferroelectric phase nature of PST films at low temperature. The thermal-activated depinning domain wall with charged defects make reversible and irreversible DW motions sharply motivated with increasing temperature except a platform behavior of irreversible DW motion in the temperature range from 170 to 220 K. The competition between the domain configuration evolution and the thermally-activated depinning process may result in this platform behavior of domain wall motion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Supplement 1, August 2017, Pages S516-S519
نویسندگان
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