Strong trilinear coupling of phonon instabilities drives the avalanche-like hybrid improper ferroelectric transition in SrBi2Nb2O9

2021 ◽  
Vol 103 (13) ◽  
Author(s):  
Aditya Prasad Roy ◽  
Naini Bajaj ◽  
Arush Gupta ◽  
Vasant Sathe ◽  
Sanjay K. Mishra ◽  
...  
Keyword(s):  
Ferroelectric Transition ◽  
Trilinear Coupling

Local atomic structure of relaxor ferroelectric solids studied by pulsed neutron scattering

1994 ◽  
Vol 52 ◽  
pp. 554-555
Author(s):  
T. Egami ◽  
H. D. Rosenfeld ◽  
S. Teslic
Keyword(s):  
Neutron Scattering ◽  
Atomic Structure ◽  
Argonne National Laboratory ◽  
Relaxor Ferroelectrics ◽  
Relaxor Ferroelectric ◽  
Crystallographic Structure ◽  
Chemical Inhomogeneity ◽  
Distribution Analysis ◽  
Ferroelectric Transition ◽  
Pulsed Neutron

Relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3 (PMN) or (Pb·88La ·12)(Zr·65Ti·35)O3 (PLZT), show diffuse ferroelectric transition which depends upon frequency of the a.c. field. In spite of their wide use in various applications details of their atomic structure and the mechanism of relaxor ferroelectric transition are not sufficiently understood. While their crystallographic structure is cubic perovskite, ABO3, their thermal factors (apparent amplitude of thermal vibration) is quite large, suggesting local displacive disorder due to heterovalent ion mixing. Electron microscopy suggests nano-scale structural as well as chemical inhomogeneity.We have studied the atomic structure of these solids by pulsed neutron scattering using the atomic pair-distribution analysis. The measurements were made at the Intense Pulsed Neutron Source (IPNS) of Argonne National Laboratory. Pulsed neutrons are produced by a pulsed proton beam accelerated to 750 MeV hitting a uranium target at a rate of 30 Hz. Even after moderation by a liquid methane moderator high flux of epithermal neutrons with energies ranging up to few eV’s remain.

Relaxor to Ferroelectric Transition in 6.5/65/35 Hot-Pressed PLZT Ferroelectrics

2004 ◽  
Vol 302 (1) ◽  
pp. 303-305
Author(s):  
B. VODOPIVEC ◽  
Z. KUTNJAK ◽  
C. FILIPIČ ◽  
A. LEVSTIK ◽  
J. HOLC ◽  
...  
Keyword(s):  
Ferroelectric Transition

The metal-ferroelectric transition in TTF-TCNQ

2009 ◽  
Vol 8 (S8) ◽  
pp. 491-498 ◽  
Author(s):  
Morrel H. Cohen ◽  
John A. Hertz ◽  
Paul M. Horn ◽  
Vinod K. S. Shante
Keyword(s):  
Ferroelectric Transition

Doping effects on the ferroelectric transition of multiferroic Y(Mn,Al/Ga)O3

2018 ◽  
Vol 98 (8) ◽  
Author(s):  
Hasung Sim ◽  
Haeri Kim ◽  
Kisoo Park ◽  
Martin Lilienblum ◽  
Manfred Fiebig ◽  
...  
Keyword(s):  
Ferroelectric Transition ◽  
Doping Effects
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