Results 41 to 50 of about 4,429 (294)

Large Electrocaloric Effect in Stretched Relaxor Ferroelectric Polymers near Morphotropic Phase Boundary

Chemistry
Use of the morphotropic phase boundary (MPB) is a promising approach to enhance the electrocaloric effect in ferroelectric polymers. This is usually achieved by a composition method, and polymer processing near the MPB to tune electrocaloric response has
Linxiao Xu, Yuquan Liu, Jiahong Li, Hangyao Wu, Yuanqi Wang, Ze Yuan, Ling Cheng, Yang Li, Huamin Zhou, Yang Liu   +9 more
doaj   +1 more source

Polarization reversal via a transient relaxor state in nonergodic relaxors near freezing temperature

Journal of Materiomics, 2019
Among the unresolved issues in the study of relaxor ferroelectrics is the role of freezing temperature, across which the dynamics of polarization reversal in relaxor ferroelectrics changes.
Chang-Hyo Hong, Hanzheng Guo, Xiaoli Tan, John E. Daniels, Wook Jo   +4 more
doaj   +1 more source

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

Advanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa, Lin‐Ding Yuan, Stephen D. Wilson, James M. Rondinelli   +3 more
wiley   +1 more source

Mechanical Behavior and Fracture Mechanisms of MXene/PVDF Nanocomponsites: In Situ Characterization and Multiscale Analysis

Advanced Functional Materials, EarlyView.
Multiscale experiments and modeling reveal how Ti3C2Tx MXene nanosheets reinforce PVDF nanocomposites. An optimal MXene loading (∼1 wt.%) nearly doubles tensile strength through efficient stress transfer, flake alignment, and crack‐deflection mechanisms, transforming ductile polymer behavior into a controlled multi‐stage fracture pathway which aligns ...
Bita Soltan Mohammadlou, James FitzPatrick, Li Meng, Kateryna Shevchuk, Ahmad Najafi, Yury Gogotsi   +5 more
wiley   +1 more source

Polarization behavior in a compositionally graded relaxor–ferroelectric crystal visualized by angle-resolved polarized Raman mapping

Communications Physics, 2023
Explaining the properties and functions of materials in terms of their atomic arrangements and inhomogeneous structures is a fundamental challenge for the development of ferroelectric oxides.
Shinya Tsukada, Yasuhiro Fujii, Akari Kanagawa, Yukikuni Akishige, Kenji Ohwada   +4 more
doaj   +1 more source

Bismuth zinc niobate: BZN-BT, a new lead-free BaTiO3-based ferroelectric relaxor?

Journal of Advanced Dielectrics, 2020
The novel lead-free ferroelectric relaxor system x(Bi(Zn2/3 Nb1/3)O3)(1 − x)BaTiO3 (xBZN(1 − x)BT) has received interest as a high-capacity relaxor dielectric material.
Jessica Marshall, David Walker, Pam Thomas   +2 more
doaj   +1 more source

Spatially Modulated Morphotropic Phase Boundaries in a Compressively Strained Multiferroic Thin Film

Advanced Functional Materials, EarlyView.
ABSTRACT The coexisting rhombohedral‐like (R′, MA) and tetragonal‐like (T′, MC) monoclinic phases in compressively strained bismuth ferrite thin films exhibit exceptional piezoelectric and magnetic properties. While previous studies have largely focused on probing the morphotropic phase boundaries (MPBs) comprising ordered R′/T′ twins, their self ...
Ting‐Ran Liu, Xiangwei Guo, Sajid Husain, Maya Ramesh, Pushpendra Gupta, Darrell Schlom, Ramamoorthy Ramesh, Yu‐Tsun Shao   +7 more
wiley   +1 more source

Titanate-based high-entropy perovskite oxides relaxor ferroelectrics

Scientific Reports
Different combinations of monovalent and trivalent A-cations in high-entropy perovskite oxides (HEPOs) were investigated. The multicomponent (A′0.2A″0.2Ba0.2Sr0.2Ca0.2)TiO3 (A′ = Na+, K+, A″ = Bi3+, La3+) perovskite compounds were successfully ...
Ketkaeo Bunpang, Suparat Singkammo, David P. Cann, Natthaphon Raengthon   +3 more
doaj   +1 more source

Non-Resonant Magnetoelectric Energy Harvesting Utilizing Phase Transformation in Relaxor Ferroelectric Single Crystals

Actuators, 2015
Recent advances in phase transition transduction enabled the design of a non-resonant broadband mechanical energy harvester that is capable of delivering an energy density per cycle up to two orders of magnitude larger than resonant cantilever ...
Peter Finkel, Richard Pérez Moyet, Marilyn Wun-Fogle, James Restorff, Jesse Kosior, Margo Staruch, Joseph Stace, Ahmed Amin   +7 more
doaj   +1 more source

Frequency and temperature dependent electric polarization, relaxation, and transport properties of Mo and W doped BaTiO3

Results in Physics, 2021
In this article, we report the structural, dielectric, electronic, and transport properties of Mo and W doped BaTiO3 ceramic. The BaTiO3 (BTO), BaTi0.85Mo0.15O3 (BTMO), and BaTi0.85W0.15O3 (BTWO) samples were prepared by double sintering ceramic ...
Md. Sarowar Hossain, Sankar Kumar Das, Md. Moniruzzaman, M.A. Hakim, M.A. Basith   +4 more
doaj   +1 more source