Results 51 to 60 of about 11,585 (198)

The nature of iron-oxygen vacancy defect centers in PbTiO3

, 2005
The iron(III) center in ferroelectric PbTiO3 together with an oxygen vacancy forms a charged defect associate, oriented along the crystallographic c-axis.
A. Abragam, D. C. Lupascu, D. M. Smyth, D. M. Smyth, H. Ehrenberg, H. Meštrić, J. F. Scott, K. A. Schönau, K.-P. Dinse, M. E. Lines, M. Knapp, P. C. Schmidt, P. W. Stephens, R. E. Cohen, R.-A. Eichel, S. H. Vosko, S. Ikegami, S. Serrano, So. Laubach, St. Laubach, T. J. Yan, T. Kloss, V. Gavrilyachenko, W. L. Warren   +23 more
core   +1 more source

Monodomain to polydomain transition in ferroelectric PbTiO3 thin films with La0.67Sr0.3MnO3 electrodes [PDF]

, 2006
Finite size effects in ferroelectric thin films have been probed in a series of epitaxial perovskite c-axis oriented PbTiO3 films grown on thin La0.67Sr0.33MnO3 epitaxial electrodes. The film thickness ranges from 480 down to 28 A (7 unit cells).
Aebi, Philippe, Ahn, Charles H., Dawber, Matthew, Despont, Laurent, Hoffman, Jason, Lichtensteiger, Celine, Stucki, Nicolas, Triscone, Jean-Marc, Yau, Jeng-Bang   +8 more
core   +3 more sources

Tunable Negative Thermal Expansion in Fe/Cr‐Substituted Nd2Co17 Compounds via Magnetoelastic Coupling

Advanced Science, EarlyView.
This study achieves anisotropic thermal expansion tuning in Nd2(Co1‐xFex)17‐yCry compounds via a magnetoelastic strategy. Variable‐temperature synchrotron X‐ray diffraction reveals that increased Fe content induces switchable lattice responses. Compositional control reduces the volume expansion coefficient αV by 20% (x═0.7) and modulates TC (442–625 K),
Jiayuan Li, Chenfei Qv, Haoran Tu, Qinfen Gu, Wayne D. Hutchison, Stewart J. Campbell, Zhenxiang Cheng, Wenquan Wang, Jianli Wang   +8 more
wiley   +1 more source

Photocatalytic and Photoelectrocatalytic Degradation of Methyl Orange Using Graphite/PbTiO₃ Composite

Indonesian Journal of Chemistry, 2016
Synthesis of graphite/PbTiO3 composite as a catalyst in photodegradation and photoelectrodegradation process of methyl orange have been conducted. The purposes of this research are to study the effect of radiation time, composition of composite, voltage ...
Candra Purnawan, Sayekti Wahyuningsih, Pramudita Putri Kusuma   +2 more
doaj   +1 more source

Aging in epitaxial ferroelectric PbTiO3 films [PDF]

Journal of Advanced Dielectrics, 2016
Ability of epitaxial perovskite oxide ferroelectric films to maintain a poled polarization state on a long-term scale is crucial for advanced devices employing such films.
Jari Hannu, Jani Peräntie, Sergiu Mihai Stratulat, Heli Jantunen, Marina Tyunina   +4 more
doaj   +1 more source

Pressure-Induced Anomalous Phase Transitions and Colossal Enhancement of Piezoelectricity in PbTiO$_3$

, 2005
We find an unexpected tetragonal-to-monoclinic-to-rhombohedral-to-cubic phase transition sequence induced by pressure, and a morphotropic phase boundary in a pure compound using first-principles calculations.
D. J. Singh, K. Uchino, M. E. Lines, Ronald E. Cohen, Zhigang Wu   +4 more
core   +1 more source

A Metal‐Free Molecular Ferroelectric With Large Piezoelectricity and Its Porous Composite for Superior Output Power Density

Advanced Science, EarlyView.
Metal‐free molecular crystal [(CH3C6H10NH3)(18‐crown‐6)][ClO4] functions as a high‐performance molecular ferroelectric. Through strategic methylation of the cyclohexylamine unit, the compound achieves large spontaneous polarization and outstanding piezoelectric coefficients.
Nan Chen, Wenjuan Wei, Le Ye, Lingyu Wan, Yen Wei   +4 more
wiley   +1 more source

Comparing the Weighted Density Approximation with the LDA and GGA for Ground State Properties of Ferroelectric Perovskites

, 2004
First-principles calculations within the weighted density approximation (WDA) were performed for ground state properties of ferroelectric perovskites PbTiO$_3$, BaTiO$_3$, SrTiO$_3$, KNbO$_3$ and KTaO$_3$. We used the plane-wave pseudopotential method, a
C. Filippi, D. A. Berlincourt, D. J. Singh, D. J. Singh, E. Wiesendanger, G. J. Fischer, H. Hellmann, J. P. Perdew, O. Gunnarsson, R. E. Cohen, R. E. Cohen, R. E. Cohen, S. Dallolio, Z. Wu, Zhigang Wu   +14 more
core   +1 more source

Optoelectronic‐Driven van der Waals Ferroelectric Materials‐Based Memory Devices for Retinomorphic and In‐Sensory Hardware

Advanced Science, EarlyView.
2D ferroelectrics materials enabling non‐volatile polarization memory, optical excitability, and neuromorphic processing within a unified material and provides a mechanistic analysis of polarization‐induced band modulation, including photon‐assisted domain reorientation, switching kinetics, and interfacial dipole coupling that governs resistive ...
Parthasarathi Pal, Yeong‐Her Wang, Sanjay Kumar, Themis Prodromakis   +3 more
wiley   +1 more source

Emerging Molecular Antiferroelectrics: Advances and Prospects

Advanced Science, EarlyView.
This review focuses on the current research progress in emerging molecular antiferroelectrics, encompassing their diverse structures, antiferroelectricity‐associated properties, and application exploration, including energy storage, electrocaloric refrigeration, and electrostriction.
Xiaoqi Li, Qianxi Wang, Xiaoyu Zhang, Yating You, Zhihua Sun, Xitao Liu, Junhua Luo   +6 more
wiley   +1 more source