Results 51 to 60 of about 9,222 (286)

Origin of the "Waterfall" Effect in Phonon Dispersion of Relaxor Perovskites [PDF]

, 2003
Inelastic neutron scattering study of the perovskite relaxor ferroelectric PZN:8%PT elucidates the origin of the previously reported unusual kink on the low frequency transverse phonon dispersion curve (known as "waterfall" effect).
Hlinka, J., Kamba, S., Kulda, J., Petzelt, J., Randall, C. A., Zhang, S. J.   +5 more
core   +2 more sources

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

Advanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp, Brahmdutta Dixit, Yifei Yang, Deyuan Lyu, Thomas Peterson, Qi Jia, Yu‐Chia Chen, Jian‐Ping Wang   +7 more
wiley   +1 more source

Two-step phase changes in cubic relaxor ferroelectrics

, 2005
The field-driven conversion between the zero-field-cooled frozen relaxor state and a ferroelectric state of several cubic relaxors is found to occur in at least two distinct steps, after a period of creep, as a function of time.
B. Dkhil, E. V. Colla, E. V. Colla, Eugene V. Colla, L. E. Cross, M. B. Weissman, M. B. Weissman, S. Vakhrushev   +7 more
core   +1 more source

Ferroelectric and dielectric characterization studies on relaxor- and ferroelectric-like strontium-barium niobates [PDF]

, 2013
Ferroelectric domain structure evolution induced by an external electric field was investigated by means of nematic liquid crystal (NLC) method in two strontium-barium niobate single crystals of nominal composition: Sr_{0.70}Ba_{0.30}Nb_{2}O_{6} (SBN:70 -
Dec, J., Lukasiewicz, T., Matyjasek, K., Miga, S.   +3 more
core   +2 more sources

Investigation of the Effects of Strain and Electric Field on the Spin‐State Energetics of Co‐Doped BaTiO3 and PbTiO3

Advanced Functional Materials, EarlyView.
Ab initio calculations using the r2SCAN functional show that biaxial strain does not alter the high spin preference of cobalt‐doped BaTiO3 and PbTiO3; a small compressive uniaxial strain however results in an equally favorable low spin state for BaTiO3 and thus bistable magnetism.
Oliver J. Conquest, Steefan Contractor, Leigh Weston, Catherine Stampfl   +3 more
wiley   +1 more source

Electrocaloric effects in ferroelectrics and multiferroics from first principles

Journal of Materiomics
The electrocaloric (EC) effect characterizes the change in temperature or entropy of a material under the application of an external electric field. Ferroelectric and multiferroic materials have attracted considerable interest due to their potential for ...
Zhijun Jiang, Xueqing Wan, Bin Xu, Jorge Íñiguez-González, Laurent Bellaiche   +4 more
doaj   +1 more source

Direct electrocaloric measurement of 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 films using scanning thermal microscopy [PDF]

, 2016
We show that scanning thermal microscopy can measure reversible electrocaloric (EC) effects in <40 μm-thick ceramic films of the relaxor ferroelectric 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3, with the substrate present.

core   +1 more source

Optimizing (1‐x) BiFeO3‐xCaTiO3 Perovskites: A Pathway to Efficient Flexible Energy Storage

Advanced Functional Materials, EarlyView.
Perovskite materials, like BFO CTO, are popular due to their high conductivity, low cost, and wide availability. In this work a symmetric electrochemical cell based on BFO‐CTO shows a charge of 3.356 C.cm⁻2, giving a specific capacitance of 2.79 mF.cm⁻2 at 1 mV.s⁻2.
Febin Paul, Shahina Shareef, Eric Kumi Barimah, Mustehsan Beg, Keng Goh, Gin Jose, Zhilun Lu, Libu Manjakkal   +7 more
wiley   +1 more source

Polaronic and Electrochemical Signatures in Group IVB (Ti, Zr, Hf) Oxides: Unified SKP–DFT Insights for Tunable Transport in Energy and Electronic Devices

Advanced Functional Materials, EarlyView.
Charge carrier concentration and mobility in TiO2, ZrO2, and HfO2 powder films are experimentally mapped as a function of temperature. The results uncover polaron‐mediated transport regimes and field‐activated conduction, enabling the design of oxide‐based electronic and energy devices with thermally tunable functionality.
Beatriz Moura Gomes, Júlia Holtz, Maria Luís Pinto, Maria Helena Braga   +3 more
wiley   +1 more source

Effects of Vacancies on Properties of Relaxor Ferroelectrics: a First-Principles Study

, 2006
A first-principles-based model is developed to investigate the influence of lead vacancies on the properties of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 (PSN).
A. García, B. P. Burton, Eric Cockayne, Jorge Íñiguez, K. M. Rabe, L. Bellaiche   +5 more
core   +1 more source