title: Ferroelectricity of Li-doped silver niobate (Ag, Li)NbO3.
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.
authors.affiliation: Division of Global Research Leaders, Shizuoka University, Hamamatsu 432-8561, Japan. ddsfu@ipc.shizuoka.ac.jp
authors.forename: Desheng
authors.initials: D
authors.lastname: Fu
authors.forename: Makoto
authors.initials: M
authors.lastname: Endo
authors.forename: Hiroki
authors.initials: H
authors.lastname: Taniguchi
authors.forename: Tomoyasu
authors.initials: T
authors.lastname: Taniyama
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Itoh
authors.forename: Shin-ya
authors.initials: SY
authors.lastname: Koshihara
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D017097:Electric Impedance; D008094:Lithium / Q000737:chemistry*; D008280:Magnetics; D008968:Molecular Conformation; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D009556:Niobium; C091692:lithium niobate; C059910:perovskite; D012834:Silver; D008094:Lithium; D014025:Titanium