Results 51 to 60 of about 1,484 (256)

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

Crossover from normal to diffused and relaxor ferroelectric in BaZrO3-modified (Ba0.85Ca0.15)TiO3 ceramics

Journal of Materiomics, 2021
The variation of dielectric, ferroelectric and piezoelectric characteristics of BaZrO3–modified (Ba0.85Ca0.15)TiO3 ceramics, (1-x)(Ba0.85Ca0.15)TiO3-xBaZrO3, have been investigated together with the structure evolution.
Shao Bo Chen, Jia Yi Yang, Shu Ya Wu, Xiang Ming Chen   +3 more
doaj   +1 more source

Embedded Ferroelectric Nanoclusters Can Drive Polarization Reversal in a Non‐Ferroelectric Polar Film via the Proximity Effect

Advanced Functional Materials, EarlyView.
Ferroelectric nanoclusters create local internal fields in a normally non‐switchable polar film because of polarization mismatch at their interfaces. That field opposes polarization in the regions with larger polarization and reinforces polarization in the regions with smaller polarization.
Anna N. Morozovska, Eugene A. Eliseev, Sergei V. Kalinin, Long‐Qing Chen, Dean R. Evans, Venkatraman Gopalan   +5 more
wiley   +1 more source

Enhanced Energy Storage Performance in La-Doped CaBi₄Ti₄O₁₅ Films Through the Formation of a Weakly Coupled Relaxor

Nanomaterials
Relaxor ferroelectric film capacitors exhibit high power density with ultra-fast charge and discharge rates, making them highly advantageous for consumer electronics and advanced pulse power supplies.
Quanlong Liu, Lei Zhang, Jun Ouyang, Yan Liu, Zhehong Tang, Jieyu Chen, Fei Guo, Yunpeng Zhou   +7 more
doaj   +1 more source

Effect of Optical Illumination on Bubble Nanodomains

Advanced Functional Materials, EarlyView.
Stable surface‐confined nanoscale bubble domains are created and manipulated in PMN‐PT single crystals. Under above‐bandgap illumination, these bubble nanodomains remain unchanged. However, upon illumination cessation, they rapidly expand to switch the entire crystal surface, due to the accumulation of a large reservoir of electrons at the crystal ...
Haoze Zhang, Anju Ahlawat, Richard F. Webster, Yunlong Sun, Dinesh Shukla, Danyang Wang, Jan Seidel, Alexei Gruverman, Pankaj Sharma   +8 more
wiley   +1 more source

Achieving Temperature‐Insensitive High Piezoelectricity by Reentrant Relaxor Transition

Advanced Science
Although precision sensors and actuators demand piezoelectric materials with temperature‐insensitive high piezoelectricity (d33), achieving such a property is physically challenging because high d33 relies on tuning the material to the vicinity of a ...
Yang Yang, Shichang Li, Liqiang He, Guanqi Wang, Chang Liu, Yiqiao Song, Yuanchao Ji, Hanbing Zhang, Jiantuo Zhao, Dong Wang, Xiaobing Ren   +10 more
doaj   +1 more source

Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry

Advanced Functional Materials, EarlyView.
A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming, Markus Griesbach, Ralf Moos, Lothar Kador, Anna Köhler   +4 more
wiley   +1 more source

Realizing high low-electric-field energy storage performance in AgNbO3 ceramics by introducing relaxor behaviour

Journal of Materiomics, 2019
Both sustainable development in environment and safety of high-power systems require to develop a novel lead-free dielectric capacitor with high energy density (Wrec) at low applied electric field.
Kai Han, Nengneng Luo, Shuaifei Mao, Fangping Zhuo, Xiyong Chen, Laijun Liu, Changzheng Hu, Huanfu Zhou, Xinpeng Wang, Yuezhou Wei   +9 more
doaj   +1 more source

Revealing the role of the constant phase element in relaxor ferroelectrics

Communications Physics, 2022
Relaxor ferroelectrics are a type of material exhibiting electrostriction whereby a change in the material shape occurs under an applied electric field; however, although known by the community for many years the underlying mechanisms of the phenomenon ...
Xavier Vendrell, Julia Ramírez-González, Zuo-Guang Ye, Anthony R. West   +3 more
doaj   +1 more source

Polarization‐Dependent Synaptic‐Like Electro‐Optical Response in Ferroelectric Nematic Liquid Crystals

Advanced Functional Materials, EarlyView.
Ferroelectric nematic liquid crystals (FNLCs) offer fast, tunable polarization and low‐voltage operation but suffer from poor polarization retention at zero field. Semiconductor‐modified FNLCs enhance polarization retention and exhibit short‐ and long‐term electro‐optical responses, while also supporting spike‐type signal integrations.
Kutay Sagdic, Weiming Yao, Danqing Liu
wiley   +1 more source