Contribution of space charges to the polarization of ferroelectric superlattices and its effect on dielectric properties
نویسندگان
چکیده
M. B. Okatan,1 I. B. Misirlioglu,2 and S. P. Alpay1,3,* 1Materials Science and Engineering Program, Department of Chemical, Materials, and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, USA 2Faculty of Engineering and Natural Sciences, Sabancı University, Tuzla-Orhanlı 34956, Istanbul, Turkey 3Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA Received 16 April 2010; revised manuscript received 15 July 2010; published 22 September 2010
منابع مشابه
Investigation the Effect of Niobium Oxide Additive on the Dielectric Properties of Bismuth Titanate
Bismuth titanate ceramic has been attracted as a lead-free ferroelectric due to its high Curie temperature in high temperature applications as well as high frequency applications. In this study, the effect of niobium oxide as an additive on the microstructure and dielectric properties of bismuth titanate ceramic was investigated. For this purpose, niobium oxide was added to bismuth titanate, sy...
متن کاملAdjustable three color optical filters using ferroelectric -dielectric generalized heterostructures photonic crystals
Abstract: The current research is aimed to investigate the alterations of its opticalfeatures of novel adjustable three color narrowband optical filters, which comprise ofblue, green and red light. A narrowband adjustable transmission optical filters accordingto dielectric- ferroelectric heterostructures photonic structures are designed using thetransfer-matrix method (T...
متن کاملEffect of Calcination Kinetics and Microwave Sintering Parameters on Dielectric and Peizo-Electric Properties of(K0.5Na0.5) NBO3 Ceramics
An efficient solid-state approach was established to synthesize (K0.5Na0.5) NbO3 ceramics using calcination kinetics and microwave assisted sintering. Milling of carbonate and oxide raw materials were carried out for 15h to obtain homogeneous nano particles. The crystallite size of 5.30 nm was obtained for the KNN system after calcination through optimized parameters and observed to be stoichio...
متن کاملLow-voltage ferroelectric–paraelectric superlattices as gate materials for field-effect transistors
The demand for new materials to be used in field-effect transistors and similar devices with low energy loss is more than ever before as integrated circuits have become a considerable source of energy consumption. One of the challenges in designing such energy efficient logic devices is finding suitable dielectric materials systems for the gate that controls the drain current in a p-type channe...
متن کاملWannier-based definition of layer polarizations in perovskite superlattices.
In insulators, the method of Marzari and Vanderbilt [Phys. Rev. B 56, 12 847 (1997)] can be used to generate maximally localized Wannier functions whose centers are related to the electronic polarization. In the case of layered insulators, this approach can be adapted to provide a natural definition of the local polarization associated with each layer, based on the locations of the nuclear char...
متن کامل