Temperature dependence of nonlinear susceptibilities near ferroelectric phase transition of a lead germanate single crystal

2006 ◽  
Vol 99 (12) ◽  
pp. 124107 ◽  
Author(s):  
S. Miga ◽  
J. Dec ◽  
A. Molak ◽  
M. Koralewski
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Lead Germanate

Chemical exchange at the ferroelectric phase transition of lead germanate revealed by solid state 207Pb nuclear magnetic resonance

2019 ◽  
Vol 21 (3) ◽  
pp. 1100-1109 ◽  
Author(s):  
Claudia E. Avalos ◽  
Brennan J. Walder ◽  
Jasmine Viger-Gravel ◽  
Arnaud Magrez ◽  
Lyndon Emsley
Keyword(s):  
Phase Transition ◽  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Chemical Exchange ◽  
Lead Germanate ◽  
Mixed Order ◽  
Nuclear Magnetic

Multi-dimensional NMR is used to quantitatively identify a mixed order–disorder and displacive mechanism for the ferroelectric phase transition of lead germanate.

Origin of ferroelectric phase transition in SbSClxI1-x mixed crystals

2014 ◽  
Vol 28 (30) ◽  
pp. 1450209 ◽  
Author(s):  
A. Audzijonis ◽  
L. Žigas ◽  
R. Sereika ◽  
R. Žaltauskas
Keyword(s):  
Phase Transition ◽  
Free Energy ◽  
Temperature Dependence ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Harmonic Approximation ◽  
Temperature Dependent ◽  
Normal Coordinate ◽  
Unit Cell Parameters ◽  
Cell Parameters

The measurements of SbSCl x I 1-x(x = 0.2) temperature dependent capacitance were carried out. The temperature of ferroelectric phase transition TC ≈340 K was measured experimentally. TC of SbSCl x I 1-x was calculated theoretically in anharmonic and harmonic approximations. TC was calculated in anharmonic approximation using temperature dependence of mean potential energy of Sb atoms as a function of the soft B1u symmetry normal coordinate along c(z)-axis. Moreover, TC was calculated in harmonic approximation using temperature dependence of vibrational thermodynamic functions (Helmholc free energy). TC dependence from unit cell parameters a, b and from mixture composition x was carried out.

Is there a spontaneous ferroelectric phase transition in 0.83PbMg1/3Nb2/3O3-0.17PbTiO3 single crystal?

2018 ◽  
Vol 748 ◽  
pp. 127-133 ◽  
Author(s):  
Š. Svirskas ◽  
D. Jablonskas ◽  
V. Samulionis ◽  
S. Kojima ◽  
J. Banys
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase

Modeling of High-Signal Electrostriction. II

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1095-1101
Author(s):  
J von Cieminski
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Strain Field ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Second Order ◽  
Experimental Results ◽  
High Signal ◽  
Qualitative And Quantitative

Abstract The predictions obtained with a thermodynamical method are compared with experimental results. Several materials which pass a ferroelectric phase transition of first or second order are investigated. The predictions correspond well with the experimentaly determined qualitative and quantitative features as to the field and temperature dependence. Finally, extraordinary strain-field curves are predicted and proved.

Electrical Properties of Pb(Mg1/3Nb2/3)-PbTiO3 Ferroelectric Single Crystal

2009 ◽  
Vol 421-422 ◽  
pp. 419-422
Author(s):  
Ghulam Shabbir ◽  
Seiji Kojima
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Single Crystal ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Charge Carriers ◽  
Frequency Range ◽  
Thermally Activated ◽  
Phase Transition Temperatures ◽  
Ferroelectric Single Crystal

The electrical properties of [001]-oriented morphotropic phase boundary (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-33%PT) single crystal have investigated as a function of temperature and frequency. The ac-conductivity exhibited continuous dispersion at all temperatures and frequency range examined and was associated to the thermally activated space charge carriers and local off-centering of Ti4+ and Pb2+ ions. The variations in ferroelectric phase transition temperatures observed in the poled state were associated to the polarization fluctuations and phase co-existence.

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