Results 251 to 260 of about 3,777 (297)

Development of Tunable Ferroelectric Ceramic Capacitors

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2023
Ferroelectric perovskite ceramics with a high dielectric constant, low loss, high tunability, and high electric breakdown are ideal for nonlinear transmission lines (NLTLs) to generate radio frequency (RF) signals at high-power levels. To achieve the required properties, a comprehensive study of the material phase transitions and the optimal ratio ...
Rangel G. Aredes, Eduardo Antonelli, Lauro P. Silva Neto, Jose O. Rossi, Gustavo N. Lima, Joaquim J. Barroso, Elizete G. L. Rangel, Edl Schamiloglu   +7 more
openaire   +2 more sources

Mathematical Model of Electric Polarization Switching in a Ferroelectric Capacitor for Ferroelectric RAM

Lecture Notes on Data Engineering and Communications Technologies, 2023
Andriy Semenov, Serhii Baraban, Olena Semenova   +2 more
exaly   +2 more sources

Depoling a ferroelectric capacitor

Applied Physics Letters, 2002
A “shrinking hysteresis loop” method, analogous to degaussing a ferromagnet, is used to depolarize a ferroelectric thin film and reach the origin, nominally the zero polarization-zero applied field state. Scanning piezoresponse imaging of the depoled state shows fragmentation into domains of up and down polarization that constitute the zero ...
M. J. Higgins, A. Krishnan, M. M. J. Treacy, S. Bhattacharya   +3 more
openaire   +1 more source

Scanners for Ferroelectric Memory Capacitors

IEEE Transactions on Electronic Computers, 1958
Many references are available on the properties and characteristics of ferroelectric materials and their memory application.1-3 The purpose of this paper is to present several scanning systems by which binary information can be stored and recalled from ferroelectric capacitor configurations.
Charles F. Pulvari, G. E. McDuffie
openaire   +1 more source

Ferroelectric variable capacitors

Ferroelectrics, 1974
Abstract The perovskite-like ferroelectric solid solutions (Pb, Sr)TiO3, BaTiO3-Pb(Fe1/2 Ta1/2)O3, PbO-MgO-Nb3O5 have been investigated. The electrical properties of the ceramics were measured in the temperature range -60-+100°C at a d.c. biasing field from 0 to 7 kv/mm and frequencies of 1 kc and 1.5 mc.
V. V. Klimov, O. S. Didkovskaja, T. P. Kisel   +2 more
openaire   +1 more source

Imprint in Ferroelectric Capacitors

Japanese Journal of Applied Physics, 1996
We show that voltage offsets in the polarization-voltage characteristics of Pb(Zr, Ti)O3 capacitors can lead to imprint in ferroelectric memory devices. The thermal-induced voltage shifts (internal bias field) are in part attributed to the role of oxygen vacancy-related defect dipoles throughout the film. In support of this, it is found that
William L. Warren, Bruce A. Tuttle, Duane Dimos, Gordon E. Pike, Husam N. Al-Shareef, Ramamoorthy Ramesh, Joseph T. Evans, Jr Jr   +7 more
openaire   +1 more source

Modeling of charge switching in ferroelectric capacitors

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004
To simulate charge switching in ferroelectric capacitors, a pair of exponential growth and decay currents is mapped to the process of polarization reversal. This is based on the fact that these exponential currents [i.e., i = I(m) e(t/tau) (t < or = 0) and i = I(m) e(-t/tau) (t > or = 0)], are completely specified by two constants I(m) and tau and each
Shunming, Sun, Thottam S, Kalkur
openaire   +2 more sources

Analysis of distortion in tunable ferroelectric capacitors

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010
The harmonic distortion in ferroelectric capacitors is measured using a parallel resonant circuit approach. The measured results have been compared with simulated results based on the nonlinearities in capacitance versus the voltage characteristics of ferroelectric capacitors.
Yulan, Zhang, T, Kalkur
openaire   +2 more sources

MODELING SWITCHING DELAY OF FERROELECTRIC DOMAINS FOR FERROELECTRIC CAPACITOR

Integrated Ferroelectrics, 2006
ABSTRACT A ferroelectric capacitor compact model based on physical basis with model parameters extracted from experimental measurements is proposed. A compact equivalent circuit of this model is presented for circuit simulation. Phenomena of hysteresis loops concerning switching delay of ferroelectric domains are described, and modification are made to
Chao-Gang Wei, Tian-Ling Ren, Li-Tian Liu   +2 more
exaly   +2 more sources

Adaptive Electronics with Ferroelectric Capacitors

Integrated Ferroelectrics, 2011
Tunable ferroelectric capacitors such as barium strontium titanate(BST) operating in the paraelectric region offer a tunability of 50%, within a applied voltage of ± 6V up to 10 GHz. They can be successfully used for a variety of adaptive frequency circuits for communication systems on a variety of substrates.
T. S. Kalkur, Yulan Zhang
openaire   +1 more source