Results 31 to 40 of about 20,019 (258)

Unusual behaviour of the ferroelectric polarization in PbTiO$_{3}$/SrTiO$_{3}$ superlattices [PDF]

, 2005
Artificial PbTiO$_{3}$/SrTiO$_{3}$ superlattices were constructed using off-axis RF magnetron sputtering. X-ray diffraction and piezoelectric atomic force microscopy were used to study the evolution of the ferroelectric polarization as the ratio of PbTiO$
Cantoni, M., Dawber, M., Ghosez, Philippe, Johnston, K., Lichtensteiger, C., Rabe, K.M., Stucki, N., Triscone, J.-M., Veithen, M.   +8 more
core   +3 more sources

Origin of the large phonon band-gap in SrTiO3 and the vibrational signatures of ferroelectricity in ATiO3 perovskite: First principles lattice dynamics and inelastic neutron scattering of PbTiO3, BaTiO3 and SrTiO3

, 2008
We report first principles density functional perturbation theory calculations and inelastic neutron scattering measurements of the phonon density of states, dispersion relations and electromechanical response of PbTiO3, BaTiO3 and SrTiO3.
A. W. Hewat, Alexander I. Kolesnikov, B. Dorner, Chun-Keung Loong, D. L. Price, Eric J. Walter, F. Jona, M. Ahart, M. E. Lines, Narayani Choudhury, V. G. Gavrilyachenko   +10 more
core   +1 more source

Substantial bulk photovoltaic effect enhancement via nanolayering. [PDF]

, 2016
Spontaneous polarization and inversion symmetry breaking in ferroelectric materials lead to their use as photovoltaic devices. However, further advancement of their applications are hindered by the paucity of ways of reducing bandgaps and enhancing ...
Grinberg, Ilya, Rappe, Andrew M, Wang, Fenggong, Young, Steve M, Zheng, Fan   +4 more
core   +1 more source

Direct evidence for ferroelectric polar distortion in ultrathin lead titanate perovskite films

, 2005
X-ray photoelectron diffraction is used to directly probe the intra-cell polar atomic distortion and tetragonality associated with ferroelectricity in ultrathin epitaxial PbTiO3 films. Our measurements, combined with ab-initio calculations, unambiguously
A. Munkholm, C. Koitzsch, C. Lichtensteiger, C. S. Fadley, E. Bousquet, F. Clerc, F. J. Garcia de Abajo, F. Jona, J. B. Pendry, J.-M. Triscone, L. Despont, M. G. Garnier, P. Aebi, Ph. Ghosez   +13 more
core   +2 more sources

Glory of piezoelectric perovskites

Science and Technology of Advanced Materials, 2015
This article reviews the history of piezoelectric perovskites and forecasts future development trends, including Uchino’s discoveries such as the Pb(Mg1/3Nb2/3)O3–PbTiO3 electrostrictor, Pb(Zn1/3Nb2/3)O3–PbTiO3 single crystal, (Pb, La)(Zr, Ti)O3 ...
Kenji Uchino
doaj   +1 more source

Epitaxially strained [001]-(PbTiO$_3$)$_1$(PbZrO$_3$)$_1$ superlattice and PbTiO$_3$ from first principles

, 2003
The effect of layer-by-layer heterostructuring and epitaxial strain on lattice instabilities and related ferroelectric properties is investigated from first principles for the [001]-(PbTiO$_3$)$_1$(PbZrO$_3$)$_1$ superlattice and pure PbTiO$_3$ on a ...
A. Garcia, B. Noheda, C. Bungaro, Claudia Bungaro, D. Vanderbilt, D.M. Ceperley, G.-M. Rignanese, G.-M. Rignanese, H.X. Fu, J. Sigman, J.B. Neaton, J.B. Neaton, J.C. Jiang, J.P. Perdew, K. M. Rabe, M.P. Warusawithana, N.A. Pertsev, P. Hohenberg, R.D. King-Smith, S. Baroni, S.E. Park, W. Kohn, Z. Wu   +22 more
core   +1 more source

Structural and dielectric study of the Na0.5Bi0.5TiO3–PbTiO3 and K0.5Bi0.5TiO3–PbTiO3 systems [PDF]

Journal of Materials Chemistry, 1997
A study of the Na 0.5 Bi 0.5 TiO 3 –PbTiO 3 and K 0.5 Bi 0.5 TiO 3 -PbTiO 3 systems has been carried out using X-ray diffraction, differential scanning calorimetry and dielectric measurements. The limits of the rhombohedral (Na 0.5 Bi 0.5 TiO 3 -rich side) and tetragonal (PbTiO 3 -rich side ...
Elkechai, Omar, Marchet, Pascal, Thomas, Philippe, Manier, Michel, Mercurio, Jean-Pierre   +4 more
openaire   +2 more sources

Ideal two-dimensional electronic structure in bulk lead titanate for superior thermoelectrics

Results in Physics
An ideal two-dimensional (2D) electronic structure is revealed in n-type tetragonal perovskite PbTiO3 through first-principle calculations. This opens exciting prospects for its applications in thermal-to-electrical energy conversion.
Te-Hsien Wang
doaj   +1 more source

تأثير درجة الحرارة على خواص العزل الكهربائي لمادة تيتانيت الرصاص PbTiO3 [PDF]

مجلة ابحاث كلية التربية الاساسية, 2012
تم تحضير مادة تيتانيت الرصاصPbTiO3 باستخدام طريقة تفاعل الحالة الصلبة. في هذه الطريقة تم حرق خليط المركبين (PbO : TiO2 ) وبنسبة مولية [1 : 1] بدرجة حرارة حرق 900 оC ولمدة 2 hr ؛ تم التحقق من تبلور ونمو الطور الرباعي لمادة PbTiO3 ((c/a=1.039 باستخدام ...
د.جاسم محمد ياسين ألنعيمي
doaj  

Decoding THz‐Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Advanced Materials, EarlyView.
ABSTRACT Ultrafast polarization dynamics in ferroelectrics are of considerable interest for high‐speed tunable dielectrics and electro‐optics. Extended domain wall networks formed in ferroelectric twin nanodomains can support collective dynamics in the terahertz regime but require techniques that track polarization and strain evolution driven by ...
Xiaojiang Li, Aiden Ross, Vladimir A. Stoica, Sujit Das, Sankalpa Hazra, Huaiyu (Hugo) Wang, Hari Padma, Matthias C. Hoffmann, Patrick Kramer, Sanghoon Song, Silke Nelson, Takahiro Sato, Diling Zhu, Ramamoorthy Ramesh, Lane W. Martin, Yue Cao, John W. Freeland, Aaron M. Lindenberg, Haidan Wen, Long‐Qing Chen, Venkatraman Gopalan   +20 more
wiley   +1 more source