کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1447770 | 988654 | 2010 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Critical properties of symmetric nanoscale metal–ferroelectric–metal capacitors Critical properties of symmetric nanoscale metal–ferroelectric–metal capacitors](/preview/png/1447770.png)
The size, surface and interface effects on the magnitude and stability of spontaneous polarization in a symmetric nanoscale ferroelectric capacitor were studied by analyzing its evolutionary trajectory based on a thermodynamic model. Analytic expressions of the Curie temperature, spontaneous polarization, critical thickness and the Curie–Weiss relation were derived, taking into account the effects of the depolarization field, built-in electric field, interfaces and surfaces. Our results show that the critical properties are not only functions of the ambient temperature, misfit strain and electromechanical boundary conditions, but also depend on the characteristics of electrodes, surfaces and interfaces, through the incomplete charge compensation, near-surface variation of polarization and work function steps of ferroelectric–electrode interfaces, which are adjustable.
Journal: Acta Materialia - Volume 58, Issue 8, May 2010, Pages 3050–3058