Results 31 to 40 of about 9,222 (286)

Random electric field instabilities of relaxor ferroelectrics

npj Quantum Materials, 2017
Complex oxides: A random field state in a relaxor ferroelectric A microscopic model shows how compositional disorder in the form of quenched random electric fields acting in concert with dipolar interactions prohibit long-range ordering in relaxor ...
José R. Arce-Gamboa, Gian G. Guzmán-Verri   +1 more
doaj   +1 more source

NMR and the local structure of relaxors [PDF]

Science of Sintering, 2002
The relaxor transition in cubic perovskite relaxors (PMN, PSN and PST) and tungsten bronze relaxor (SBN) has been studied by NMR. The observed spectra are composed of a narrow -1/2 « 1/2 central transition superimposed on a broad background due to ...
Blinc R., Zalar B., Gregorovič Alan
doaj   +1 more source

Time-Resolved Nanobeam X-ray Diffraction of a Relaxor Ferroelectric Single Crystal under an Alternating Electric Field

Crystals, 2021
Lead-containing relaxor ferroelectrics show enormous piezoelectric capabilities relating to their heterogeneous structures. Time-resolved nanobeam X-ray diffraction reveals the time and position dependences of the local lattice strain on a relaxor ...
Shinobu Aoyagi, Ayumi Aoyagi, Hiroaki Takeda, Hitoshi Osawa, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura   +6 more
doaj   +1 more source

Enhanced strain and electrostrictive properties in lead-free BNT-based ceramics via rare earth doping

Journal of Materiomics, 2022
Bi0.5Na0.5TiO3 (BNT)-based ceramics are one of the most promising lead-free ferroelectrics due to their high strain property. Compared to other chemical modifications, rare earth ions doping provides significant possibility to optimize the strain ...
Anping Deng, Jiagang Wu
doaj   +1 more source

Development of Ferroelectric Order in Relaxor (1-x)Pb(Mg1/3Nb2/3)O3 - xPbTiO3

, 2002
The microstructure and phase transition in relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 (PMN) and its solid solution with PbTiO3 (PT), PMN-xPT, remain to be one of the most puzzling issues of solid state science.
A. A. Bokov, A. A. Bokov, A. A. Bokov, A. A. Bokov, A. A. Bokov, A. A. Bokov, A. A. Bokov, B. Dkhil, B. Noheda, B. Noheda, B. Noheda, C.-S. Tu, D. Viehland, E. V. Colla, G. Burns, G. Calvarin, G. K. Williamson, G. Shirane, H. Arndt, J. Gao, K. Fujishiro, K. Hirota, L. Bellaiche, L. E. Cross, L. W. Finger, N. de Mathan, O. Bunina, O. Didault, O. Noblanc, P. Bonneau, P. M. Gehring, P. Stephens, R. Blinc, R. D. Shannon, R. E. Newhnam, R. Pirc, S. B. Vakhrushev, S. J. Jang, S. L. Swartz, S. W. Choi, S. Wakimoto, S.-E. Park, S.-E. Park, T. Shrout, T. Y. Koo, V. Westphal, W. Kleemann, Y. Bing, Y. Imry, Y. Uesu, Z.-G. Ye, Z.-G. Ye, Z.-G. Ye, Z.-G. Ye, Z.-G. Ye   +54 more
core   +1 more source

Theoretical prediction of electrocaloric effect based on non-linear behaviors of dielectric permittivity under temperature and electric fields

AIP Advances, 2015
The electrocaloric (EC) effect has been paid great attentions recently for applications on cooling or electricity generation. However, the directly commercial measurement equipment for the effect is still unavailable.
Hongbo Liu, Xue Yang
doaj   +1 more source

First Principles Theories of Piezoelectric Materials

, 2007
Piezoelectrics have long been studied using parameterized models fit to experimental data, starting with the work of Devonshire in 1954. Much has been learned using such approaches, but they can also miss major phenomena if the materials properties are ...
Cohen, R. E.
core   +1 more source

Finite-size effects in lead scandium tantalate relaxor thin films [PDF]

, 2020
Large electromechanical effects in relaxor ferroelectrics are generally attributed to the collective response of an ensemble of correlated, nanometer-sized polar structures induced by chemical and charge disorder.
Fernandez, A, Kim, J, Martin, LW, Meyers, D, Saremi, S   +4 more
core  

An Overview of Linear Dielectric Polymers and Their Nanocomposites for Energy Storage

Molecules, 2021
As one of the most important energy storage devices, dielectric capacitors have attracted increasing attention because of their ultrahigh power density, which allows them to play a critical role in many high-power electrical systems.
Lvye Dou, Yuan-Hua Lin, Ce-Wen Nan
doaj   +1 more source

Temperature-dependent energy storage characterization of Pb-free relaxor ferroelectrics [PDF]

Journal of Advanced Dielectrics, 2020
The energy storage properties of (1−x)Bi0.5Na0.5TiO3–xBaTiO3(0≤x≤0.08) (BNT–BT) ceramics obtained via sol–gel method are determined from the polarization versus electric field (P–E) loops at various temperatures. The energy storage densities are observed
Sarir Uddin, Guang-Ping Zheng, Asif Khan, Muhammad Riaz Khan, Banaras Khan   +4 more
doaj   +1 more source