Ferroelectricity of Li-doped silver niobate (Ag,Li)NbO3

Details Ferroelectricity of Li-doped silver niobate (Ag,Li)NbO3 Ferroelectricity of Li-doped silver niobate (Ag,Li)NbO3

2011-02-22

arxiv.org/abs/1102.4504v1

Journal of Physics: Condensed Matter 23, 075901 (2011)

Physics

Condensed Matter

Materials Science

18 pages,6 figures

Scientific paper

10.1088/0953-8984/23/7/075901

Phase evolution in (Ag1-xLix)NbO3 (ALN) solid solution was investigated by X-ray diffraction technique, dielectric and polarization measurements. It is shown that small substitution of Ag with Li gives rise to an orthorhombic-rhombohedral structural transformation in ABO3-perovskite silver niobate at room temperature. Structural refinements indicate that both A- and B-site displacements contribute to the spontaneous polarization of the ferroelectric phase with symmetry R3c. Increasing Li-concentration enhances the ferroelectric rhombohedral distortion, resulting in the increase of the para-ferroelectric phase transition temperature and the polarization of the solid solutions.

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