Volume 94, Number 5, June 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||17 May 2011|
Direction of polarization →P and the dipole interaction in the ferroelectric phase of SrTi18O3
Department of Engineering Science, University of Electro-Communications - Chofu-shi, Tokyo 182-8585, Japan
Accepted: 26 April 2011
The structure of isotope-substituted SrTi18O3 (STO18) below Tc=24 K has not been made fully understood yet. We have shown that it is orthorhombic C2v with polarization parallel to c, but other groups reported other structures such as and . In this paper, it is shown that the dipole interaction between the rhombohedral polar clusters which has been revealed by NMR (Blinc R. et al., Phys. Rev. Lett., 94 (2005) 147601) is the very probable reason for the formation of . The dipole interaction model is consistent with various peculiarities observed in the Raman spectra (Shigenari T. et al., Phys. Rev. B, 74 (2006) 174121) such as the inhomogeneity, the imperfect softening and the appearance of the relaxational mode near Tc.
PACS: 77.80.B- – Phase transitions and Curie point / 77.80.Dj – Domain structure; hysteresis / 78.30.-j – Infrared and Raman spectra
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.