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Title: Critical properties of symmetric nano scale metal-ferroelectric-metal capacitors
Authors: Zheng, Y
Cai, MQ
Woo, CH 
Keywords: Ferroelectric
Curie temperature
Critical thickness
Stability analysis
Issue Date: 2010
Publisher: Pergamon-Elsevier Science Ltd
Source: Acta materialia, 2010, v. 58, no. 8, p. 3050-3058 How to cite?
Journal: Acta Materialia 
Abstract: 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
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2010.01.039
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