scholarly journals Phase instability induced by polar nanoregions in a relaxor ferroelectric system

2008 ◽  
Vol 7 (7) ◽  
pp. 562-566 ◽  
Author(s):  
Guangyong Xu ◽  
Jinsheng Wen ◽  
C. Stock ◽  
P. M. Gehring
Keyword(s):  
Relaxor Ferroelectric ◽  
Phase Instability ◽  
Polar Nanoregions

scholarly journals Diffuse scattering from the lead-based relaxor ferroelectric PbMg1/3Ta2/3O3

2011 ◽  
Vol 44 (3) ◽  
pp. 603-609 ◽  
Author(s):  
Antonio Cervellino ◽  
S. N. Gvasaliya ◽  
O. Zaharko ◽  
B. Roessli ◽  
G. M. Rotaru ◽  
...  
Keyword(s):  
Single Crystal ◽  
Atomic Structure ◽  
Diffuse Scattering ◽  
Relaxor Ferroelectric ◽  
The Other ◽  
X Ray Diffraction ◽  
Correlation Lengths ◽  
X Ray ◽  
Displacement Vectors ◽  
Polar Nanoregions

The relaxor ferroelectric PbMg1/3Ta2/3O3was studied by single-crystal neutron and synchrotron X-ray diffraction, and its detailed atomic structure modelled in terms of static Pb displacements that lead to the formation of polar nanoregions. Similar to the other members of the Pb-based relaxor family like PbMg1/3Nb2/3O3or PbZn1/3Nb2/3O3the diffuse scattering in the [H00]/[0K0] scattering plane has a butterfly shape around theh00 Bragg reflections and is orthogonal to the scattering vector forhh0 peaks. In the [HH0]/[00L] plane the diffuse scattering is elongated along the 〈112〉 directions and is orthogonal to the scattering vector forhhhreflections. It is found that a model consisting of correlated Pb displacements along the 〈111〉 directions reproduces adequately the main features of the diffuse scattering in PbMg1/3Ta2/3O3when the correlation lengths between the Pb-ion displacement vectors are longest along the 〈111〉 and shortest along the 〈11{\overline 2}〉 and 〈1{\overline 1}0〉 directions.

Dynamics of Central Peaks in the Brillouin Scattering Spectra of Relaxor Ferroelectrics

2009 ◽  
Vol 421-422 ◽  
pp. 403-406
Author(s):  
Ghulam Shabbir ◽  
Seiji Kojima
Keyword(s):  
High Resolution ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Brillouin Scattering ◽  
Relaxor Ferroelectrics ◽  
Relaxor Ferroelectric ◽  
Subsequent Growth ◽  
Scattering Technique ◽  
Scattering Spectra ◽  
Polar Nanoregions

High-resolution Brillouin scattering technique was applied to study the dynamics of central peaks (CPs) in two relaxor ferroelectric systems, PLZT-x/65/35 ceramics and PMN-33%PT [001] single crystals, respectively. It was found that CPs appear very close to an intermediate temperature, Td, for both type of specimens. The temperature dependence of CPs was attributed to the appearance and subsequent growth of polar nanoregions (PNRs) intrinsic to relaxor materials.

Dynamical Properties of Polar Nanoregions of Relaxor Ferroelectric Pb(Ni1/3Nb2/3)O3–0.29PbTiO3

2008 ◽  
Vol 77 (3) ◽  
pp. 033707 ◽  
Author(s):  
Shinya Tsukada ◽  
Yuji Ike ◽  
Jun Kano ◽  
Tadashi Sekiya ◽  
Yoshiro Shimojo ◽  
...  
Keyword(s):  
Relaxor Ferroelectric ◽  
Dynamical Properties ◽  
Polar Nanoregions

scholarly journals Local atomic order and hierarchical polar nanoregions in a classical relaxor ferroelectric

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
M. Eremenko ◽  
V. Krayzman ◽  
A. Bosak ◽  
H. Y. Playford ◽  
K. W. Chapman ◽  
...  
Keyword(s):  
Relaxor Ferroelectric ◽  
Atomic Order ◽  
Polar Nanoregions

Study on Dielectric Relaxation in BiFeO3/Bi3.25La0.75Ti3O12 Film

2012 ◽  
Vol 502 ◽  
pp. 82-86
Author(s):  
Hui Xian Wang ◽  
Wei Li Zhu ◽  
Li Ben Li ◽  
Qing Dong Chen
Keyword(s):  
Dielectric Relaxation ◽  
Leakage Current ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Film ◽  
Relaxation Behavior ◽  
Si Substrate ◽  
Dielectric Relaxation Behavior ◽  
Polar Nanoregions ◽  
Relaxation Characteristics ◽  
Theoretical Results

BiFeO3 (BFO) film is considered as relaxor ferroelectric film with a leakage current, and Bi3.25La0.75Ti3O12 (BLT) film is regarded as ferroelectric film with a leakage current. Maxwell- Wagner (M-W) theory has been used to study the dielectric relaxation behavior of BiFeO3 (BFO)/Bi3.25La0.75Ti3O12 (BLT) films grown on Pt/Ti/SiO2/Si substrate. Results show that the characteristics of BFO film significantly affect the dielectric relaxation behavior of the BFO/BLT film. The theoretical results agree well with the experimental data when the temperature is above 400K. It is inferred that the polycrystalline orientation of BFO film leads to the presence of disorganized polar nanoregions (PNRs) in BFO film. And BFO film exhibits relaxation characteristics at high temperatures.

Dielectric evidence of persistence of polar nanoregions within the ferroelectric phases of (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 relaxor ferroelectric system

2015 ◽  
Vol 118 (3) ◽  
pp. 034104 ◽  
Author(s):  
Mouhamed Amin Hentati ◽  
Hichem Dammak ◽  
Hamadi Khemakhem ◽  
Nicolas Guiblin ◽  
Mai Pham Thi
Keyword(s):  
Relaxor Ferroelectric ◽  
Polar Nanoregions

scholarly journals Superparamagnetism Induced by Polar Nanoregions in Relaxor Ferroelectric (1-x)BiFeO3–xBaTiO3

2011 ◽  
Vol 80 (4) ◽  
pp. 043705 ◽  
Author(s):  
Minoru Soda ◽  
Masato Matsuura ◽  
Yusuke Wakabayashi ◽  
Kazuma Hirota
Keyword(s):  
Relaxor Ferroelectric ◽  
Polar Nanoregions

scholarly journals Phonon localization drives polar nanoregions in a relaxor ferroelectric

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
M.E. Manley ◽  
J.W. Lynn ◽  
D.L. Abernathy ◽  
E.D. Specht ◽  
O. Delaire ◽  
...  
Keyword(s):  
Relaxor Ferroelectric ◽  
Phonon Localization ◽  
Polar Nanoregions

scholarly journals Polar nanoregions and diffuse scattering in the relaxor ferroelectric PbMg1/3Nb2/3O3

2012 ◽  
Vol 85 (22) ◽  
Author(s):  
M. Paściak ◽  
T. R. Welberry ◽  
J. Kulda ◽  
M. Kempa ◽  
J. Hlinka
Keyword(s):  
Diffuse Scattering ◽  
Relaxor Ferroelectric ◽  
Polar Nanoregions

scholarly journals Electrocaloric effect and freezing temperature in (Pb0.8Ba0.2)[(Zn1∕3Nb2∕3)0.7Ti0.3]O3 relaxor ferroelectric ceramic

2016 ◽  
Vol 06 (03) ◽  
pp. 1620002 ◽  
Author(s):  
A. Peláiz-Barranco ◽  
F. Calderón-Piñar ◽  
Y. Mendez-González
Keyword(s):  
Critical Temperature ◽  
Indirect Method ◽  
Hysteresis Loops ◽  
Indirect Evidence ◽  
Freezing Temperature ◽  
Ferroelectric Ceramic ◽  
Relaxor Ferroelectric ◽  
Electrocaloric Effect ◽  
Maximum Value ◽  
Polar Nanoregions

The electrocaloric effect (ECE) is studied in (Pb[Formula: see text]Ba[Formula: see text][(Zn[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]]O3 relaxor ferroelectric ceramic by using an “indirect method”. The electric dependence for the polarization (hysteresis loops) has been obtained for several temperatures showing typical relaxor characteristics. The temperature change [Formula: see text], which is associated with the ECE, is calculated by using the temperature dependence for the polarization. A maximum value for [Formula: see text] is observed for temperatures close above the freezing temperature, showing an indirect evidence of that critical temperature. The results are discussed considering the contribution of the polar nanoregions to the polarization.

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