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Title: Phase transitions and thermal-stress-induced structural changes in a ferroelectric Pb (Zr0.80Ti0. 20)O3 single crystal

Journal Article · · Journal of Physics. Condensed Matter
 [1];  [1];  [2];  [3];  [3];  [2];  [4]
  1. Finnish Research and Engineering, Helsinki (Finland)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Simon Fraser Univ., Burnaby, BC (Canada)
  4. Univ. of Oxford (United Kingdom). Clarendon Lab.

Zirconium-rich lead-zirconate-titanate (PZT) Pb(Zr0.80Ti0.20)O3 single crystal is studied by polarized-Raman scattering experiments as a function of temperature. We show that the crystal possesses complex domain boundaries which show no sign of instability even 200 K above the ferroelectric-to-paraelectric phase transition. The boundary stabilized the domains which had the same orientation after cyclic heating and cooling up to 773 K. The domains transformed normally to the cubic paraelectric phase, but returned to their original state after cooling. Physical mechanism behind the reversible behavior is related to the strain between the boundary region and domain, which forces the domain to grow similarly after each heating and cooling cycle. Electron backscattering diffraction measurements show that macroscopic domains, lengths scale in hundreds of microns, are divided into regions whose Pb-displacements are not correlated. The results are notably interesting for non-volatile memory development as it implies that the original ferroelectric state can be restored after the material has been transformed to a paraelectric phase. Incoherent Pbdisplacements play a role for polarization switching.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265685
Journal Information:
Journal of Physics. Condensed Matter, Vol. 27, Issue 2; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Compression mechanisms of ferroelectric PbTiO 3 via high pressure neutron scattering journal October 2018

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