Results 71 to 80 of about 17,703 (286)

A Thermodynamic Model of Antiferroelectics and Its Application to Electric Field Induced Antiferroelectric‐Ferroelectric Transition in PbZrO3

Advanced Functional Materials, EarlyView.
A thermodynamic model that incorporates ferroelectric, antiferroelectric, and antiferrodistortive orders of PbZrO3${\rm PbZrO}_3$ is established and parameterized based on experimental measurements and first‐principles calculations. We derive a Clapeyron‐like equation for describing the temperature‐dependence of critical electric fields for the ...
Zhiyang Wang, Guodong Zhao, Aiden Ross, Long‐Qing Chen   +3 more
wiley   +1 more source

Non-Linear Dielectric Properties of PLMN-PT Relaxor Ferroelectrics

, 2008
Recent investigations on the non-linear (NL) dielectric properties of relaxor ferroelectrics systems, not only as ceramic bodies, but also, in thin films, have showed a significant technological and scientific interest.
Souza, J. A., Garcia, D., Eiras, J. A., Guerra, J. D. S.   +3 more
core   +1 more source

Operando Tracking of Oxygen‐Vacancy Dynamics and Negative Capacitance in Ca‐Doped BiFeO3

Advanced Functional Materials, EarlyView.
Operando electrochemical impedance spectroscopy, combined with electrocoloration, enables a direct correlation between real‐space ionic redistribution and the corresponding frequency‐domain electrical response. In lateral Ca‐doped BiFeO3 devices, time‐resolved impedance snapshots capture the evolution from bulk‐dominated mixed conduction to an ...
Jeonghun Suh, Heung‐Sik Park, Jong‐Sook Lee, Chan‐Ho Yang   +3 more
wiley   +1 more source

Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO₃-BaTiO₃ relaxor ferroelectrics by means of ²³Na NMR [PDF]

, 2023
We address the unsolved question on the structure of relaxor ferroelectrics at the atomic level by characterizing lead-free piezoceramic solid solutions (100−x)(Bi1/2Na1/2)TiO₃−xBaTiO₃ (BNT−xBT) (for x=1,4,6, and 15).
Jo, Wook, Sapper, Eva, Dittmer, Robert, Buntkowsky, Gerd, Breitzke, Hergen, Rödel, Jürgen, Groszewicz, Pedro B.   +6 more
core   +1 more source

Harnessing local inhomogeneity for enhanced dielectric energy storage

Nature Communications
Inorganic dielectric capacitors are highly demanded in pulsed systems due to their high-power output, but the low energy density limits device miniaturization.
Yiqian Liu, Bingbing Yang, Shun Lan, Zhifang Zhou, Lvye Dou, Ce-Wen Nan, Yuan-Hua Lin   +6 more
doaj   +1 more source

Designing polar textures with ultrafast neuromorphic features from atomistic simulations

Neuromorphic Computing and Engineering, 2023
This review summarizes recent works, all using a specific atomistic approach, that predict and explain the occurrence of key features for neuromorphic computing in three archetypical dipolar materials, when they are subject to THz excitations.
Sergey Prosandeev, Sergei Prokhorenko, Yousra Nahas, Yali Yang, Changsong Xu, Julie Grollier, Diyar Talbayev, Brahim Dkhil, L Bellaiche   +8 more
doaj   +1 more source

Noise‐Limited Bit Precision in Ferroelectric Synaptic Transistors for High‐Resolution Neuromorphic Computing

Advanced Functional Materials, EarlyView.
Low‐frequency noise spectroscopy defines the resolvable conductance states of synaptic FeFETs by coupling read‐current fluctuation with usable dynamic range. The resulting noise‐limited bit precision establishes a universal, device‐agnostic reliability metric beyond the memory window, enabling quantitative benchmarking and rational design of high ...
Jaehong Park, Yeonseop Shin, Changhyeon Han, Sangwoo Kim, Eunchan Park, Youngchan Cho, Jaehong Min, Hyunjun Ahn, Jaekyoung Park, Cheol‐Woong Yang, Jangsaeng Kim, Daewoong Kwon, Wonjun Shin   +12 more
wiley   +1 more source

Local symmetry approach to relaxor ferroelectrics

, 2013
We propose a theoretical framework based on local gauge symmetries and develop a first-principles–derived effective Hamiltonian to study relaxor ferroelectrics.
I. Kornev, Nahas, Y., Y. Nahas, Kornev, I.   +3 more
core   +1 more source

Investigation of complex phase transitions of relaxor ferroelectric PMN–28PT under combined electric field and temperature stimuli

Journal of Advanced Dielectrics
Relaxor ferroelectrics are an important class of functional materials because of their highly tunable dielectric permittivity, excellent temperature stability and low coercive field.
Long Cheng, Nicolas Guiblin, Oana Condurache, Brahim Dkhil, Minghai Yao, Ran Xu   +5 more
doaj   +1 more source

Dielectric properties of ceramics in lead zirconate titanate - lead magnesium niobate system [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2004
In this study, the xPb(Zr0.52Ti0.48)O3 - (1-x)Pb(Mg1/3Nb2/3)O3 (when x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) ceramic composites are prepared from PZT and PMN powders by a conventional mixed-oxide method.
Pitak Laoratakul, Rattikorn Yimnirun, Supon Ananta   +2 more
doaj