Ru doping induced quantum paraelectricity in ferroelectric Sr0.9Ba0.1TiO3.

Authors :: Wei, T.
Guo, Y. J.
Wang, P. W.
Yu, D. P.
Wang, K. F.
Lu, C. L.
Liu, J.-M.
Source :: Applied Physics Letters; 4/28/2008, Vol. 92 Issue 17, p172912, 3p, 1 Chart, 4 Graphs
Publication Year :: 2008
Abstract: We investigate the effect of Ru doping on the dielectric and ferroelectric behaviors of polycrystalline Sr<subscript>0.9</subscript>Ba<subscript>0.1</subscript>TiO<subscript>3</subscript>. It is observed that the Ru doping significantly suppresses the ferroelectric mode, as evidenced by the Raman spectroscopy at various temperatures. The enhanced quantum fluctuation associated with the incorporation of Ru<superscript>4+</superscript> at B site is demonstrated, which transforms Sr<subscript>0.9</subscript>Ba<subscript>0.1</subscript>TiO<subscript>3</subscript> from the ferroelectric state into a typical quantum paraelectric state. [ABSTRACT FROM AUTHOR]