Monoclinic MC phase in (001) field cooled BaTiO3 single crystals

Hu Cao; Devreugd, Christopher P.; Wenwei Ge; Jiefang Li; Viehland, D.; Haosu Luo; Xiangyong Zhao
January 2009
Applied Physics Letters;1/19/2009, Vol. 94 Issue 3, pN.PAG
Academic Journal
We report here the finding of a new phase in BaTiO3 single crystals. High precision x-ray diffraction investigations of (001) field cooled crystals have shown the presence of a monoclinic MC phase for temperatures below 300 K. This MC phase is shown to be stable upon removal of the electric field. The results demonstrate the presence of structurally bridging low symmetry phases that lie between tetragonal and rhombohedral ones in this classic perovskite system: indicating a means to achieve high piezoelectricity in Pb-free systems via domain engineering.


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