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The Journal of Engineering

Passive voltage amplification in non-leaky ferroelectric–dielectric heterostructure

Content Provider	IET Digital Library
Author	Awadhiya, Bhaskar Kondekar, Pravin N. Meshram, Ashvinee Deo
Abstract	This work presents the effect of ferroelectric thickness variation on properties (negative capacitance stabilisation, voltage amplification and capacitance enhancement) of ferroelectric–dielectric (FE–DE) heterostructure. For a better understanding of heterostructure, the study has analysed isolated ferroelectric capacitor first. Results clearly indicate the unstable nature of negative capacitance in ferroelectric capacitor. This negative capacitance can be stabilised by adding a dielectric capacitor in series with ferroelectric capacitor. Dielectric capacitor not only stabilises the negative capacitance state but is also responsible for the increase in capacitance of heterostructure. Afterwards dynamic response of FE–DE hetrostructure is studied. It is observed that thickness has strong dependence on ferroelectric parameters. With the increase in ferroelectric thickness, ferroelectric capacitance decreases and hence leads to voltage amplification. However, ferroelectric thickness should not be increased beyond critical thickness, as beyond critical thickness voltage amplification cannot be achieved without hysteresis.
Starting Page	1399
Ending Page	1403
Page Count	5
Volume Number	13
e-ISSN	17500443
Issue Number	Issue 10, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/mnl/13/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/mnl.2018.5172
Journal	Micro & Nano Letters
Publisher Date	2018-10-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Capacitance Capacitance Enhancement Capacitor Critical Thickness Voltage Amplification Dielectric Capacitor Dielectric Hysteresis Ferroelectric Capacitance Ferroelectric Capacitor Ferroelectric Material Ferroelectric Parameter Ferroelectric Thickness Variation Negative Capacitance Stabilisation Negative Capacitance State Nonleaky Ferroelectric–dielectric Heterostructure Passive Voltage Amplification Piezoelectric And Ferroelectric Material
Content Type	Text
Resource Type	Article

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