Incomplete ferroelectricity in SrTi 18O 3
Max-Planck-Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
2 Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA
Corresponding author: a email@example.com
Published online: 11 October 2006
Motivated by recent experiments demonstrating suppression of ferroelectricity with pressure in SrTi18O3, the dynamics of the phase transition mechanism are reinvestigated within a nonlinear polarizability model. For temperatures far above the phase transition polar micro domains are formed which increase in size with decreasing temperature to freeze out at Tc without forming long range order. Experimentally, soft mode dynamics are simultaneously observed, evidencing that displacive and order/disorder features coexist. In the ferroelectric phase both components persist whereby an incomplete and inhomogeneous ferroelectric state is formed.
PACS: 77.80.Bh – Phase transitions and Curie point / 77.80.-e – Ferroelectricity and antiferroelectricity / 05.45.-a – Nonlinear dynamics and chaos
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006