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  • Title: Ferroelectricity of Li-doped silver niobate (Ag, Li)NbO3.
    Author: Fu D, Endo M, Taniguchi H, Taniyama T, Itoh M, Koshihara SY.
    Journal: J Phys Condens Matter; 2011 Feb 23; 23(7):075901. PubMed ID: 21411887.
    Abstract:
    Phase evolution in (Ag(1-x)Li(x))NbO(3) (ALN) solid solution was investigated by the x-ray diffraction technique, dielectric and polarization measurements. It is shown that a small substitution of Ag with Li gives rise to an orthorhombic-rhombohedral structural transformation in ABO(3)-perovskite silver niobate at room temperature. Structural refinements indicate that both the 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 an increase of the para-ferroelectric phase transition temperature and the polarization of the solid solutions.
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