SXRD Charge Density of KNbO₃ Ferroelectric Perovskite

References

• G. Shirane, H. Danner, A. Pavlovic, and R. Pepinsky, Phase transitions in ferroelectric KNbO3. Phys Rev. 93, 672–673 (1954).
   Web of Science ®Google Scholar
• A.W. Hewat, Cubic-tetragonal-orthorhombic-rhombohedral ferroelectric transitions in perovskite potassium niobate: neutron powder profile refinement of the structures. J Phys C. 6, 2559–2572 (1973).
   Web of Science ®Google Scholar
• A.V. Hippel, Ferroelectricity, domain structure, and phase transitions of barium titanate. Rev Mod Phys. 22, 221–237 (1950).
   Web of Science ®Google Scholar
• T. Takenaka, H. Nagata, and Y. Hiruma, Current developments and prospective of lead-free piezoelectric ceramics. Jpn J Appl Phys. 47, 3787–3801 (2008).
   Web of Science ®Google Scholar
• C. Moriyoshi, J. Kato, Y. Terado, S. Wada, M. Takata, and Y. Kuroiwa, Electron charge density study of (Na1-xKx)NbO3 in cubic structure. Jpn J Appl Phys. 47, 7745–7748 (2008).
   Web of Science ®Google Scholar
• Y. Saito, H. Takao, T. Tani, T. Nonoyama, K. Takatori, T. Homma, T. Nagaya, and M. Nakamura, Lead-free piezoceramics. Nature. 432, 84–87 (2004).
   PubMed Web of Science ®Google Scholar
• Y. Guo, K. Kakimoto, and H. Ohsato, Phase transitional behavior and piezoelectric properties of (Na0.5K0.5)NbO3-LiNbO3 ceramics. Appl Phys Lett. 85, 4121–4123 (2004).
   Web of Science ®Google Scholar
• S. Triebwasser, Behavior of ferroelectric KNbO3 in the vicinity of the cubic-tetragonal transition. Phys Rev. 101, 993–997 (1956).
   Web of Science ®Google Scholar
• S.H. Wemple, M. Didomenico, Jr., and I. Camlibel, Dielectric and optical properties of melt-grown BaTiO3. J Phys Chem Solids. 29, 1797–1803 (1968).
   Web of Science ®Google Scholar
• Y. Kuroiwa, S. Aoyagi, A. Sawada, J. Harada, E. Nishibori, M. Takata, and M. Sakata, Evidence for Pb-O covalency in tetragonal PbTiO3. Phys Rev Lett. 87, 217601-1-4 (2001).
   PubMed Web of Science ®Google Scholar
• S. Aoyagi, Y. Kuroiwa, A. Sawada, H. Tanaka, J. Harada, E. Nishibori, M. Takata, and M. Sakata, Direct observation of covalency between O and disordered Pb in cubic PbZrO3. J Phys Soc Jpn. 71, 2353–2356 (2002).
   Google Scholar
• Y. Kuroiwa, H. Fujiwara, A. Sawada, S. Aoyagi, E. Nishibori, M. Sakata, M. Takata, H. Kawaji, and T. Atake, Distinctive charge density distributions of perovskite-type antiferroelectric oxides PbZrO3 and PbHfO3 in cubic phase. Jpn J Appl Phys. 43, 6799–6802 (2004).
   Web of Science ®Google Scholar
• H. Tanaka, Y. Kuroiwa, and M. Takata, Electrostatic potential of ferroelectric PbTiO3: Visualized electron polarization of Pb ion. Phys Rev B. 74, . 172105-1-4 (2006).
   Web of Science ®Google Scholar
• S. Kawamura, E. Magome, C. Moriyoshi, Y. Kuroiwa, N. Taniguchi, H. Tanaka, S. Maki, M. Takata, and S. Wada, Electronic polarization in KNbO3 visualized by synchrotron radiation powder diffraction. Jpn J Appl Phys. in press.
   Google Scholar
• E. Nishibori, M. Takata, K. Kato, M. Sakata, Y. Kubota, S. Aoyagi, Y. Kuroiwa, M. Yamakata, and N. Ikeda, The large Debye–Scherrer camera installed at SPring-8 BL02B2 for charge density studies. Nucl Instrum Methods Phys Res A. 467–468, 1045–1048 (2001).
   Web of Science ®Google Scholar
• M. Takata, The MEM/Rietveld method with nano-applications - accurate charge-density studies of nano-structured materials by synchrotron-radiation powder diffraction. Acta Crystallogr A. 64, 232–245 (2008).
   PubMed Web of Science ®Google Scholar
• H. Tanaka, M. Takata, E. Nishibori, K. Kato, T. Iishi, and M. Sakata, ENIGMA: maximum-entropy method program package for huge systems. J Appl Crystallogr. 35, 282–286 (2002).
   Web of Science ®Google Scholar
• S. Aoyagi, Y. Kuroiwa, A. Sawada, I. Yamashita, and T. Atake, Composite structure of BaTiO3 nanoparticle investigated by SR x-ray diffraction. J Phys Soc Jpn. 71, . 1218–1221 (2002).
   Google Scholar
• Y. Kuroiwa, S. Aoyagi, A. Sawada, H. Ikawa, I. Yamashita, N. Inoue, and T. Atake, Structural study of perovskite-type fine particles by synchrotron radiation powder diffraction. J Therm Anal Calorimetry. 69, 933–938 (2002).
   Web of Science ®Google Scholar
• T. Hoshina, S. Wada, Y. Kuroiwa, and T. Tsurumi, Composite structure and size effect of barium titanate nanoparticles. Appl Phys Lett. 93, . 192914-1-3 (2008).
   Web of Science ®Google Scholar
• E. Magome, Y. Kuroiwa, H. Yoshimura, C. Moriyoshi, K. Yamashita, I. Fujii, K. Nakashima, N. Kumada, and S. Wada, Crystal structure of BaTiO3-KNbO3 nanocomposite ceramics: Relationship between dielectric property and structure of heteroepitaxial interface. Jpn J Appl Phys. 51, . 09LE05-1-4 (2012).
   Web of Science ®Google Scholar
• H. Miyazawa, E. Natori, S. Miyashita, T. Shimoda, F. Ishii, and T. Oguchi, Electronic States of Perovskite-Type Oxides and Ferroelectricity. Jpn J Appl Phys. 39, 5679–5682 (2000).
   Web of Science ®Google Scholar
• R.S. Mulliken, Electronic population analysis on LCAO-MO molecular wave functions. I. J Chem Phys. 23, 1833–1840 (1955).
   Web of Science ®Google Scholar
• W. Zhong, R.D. King-Smith, and D. Vanderbilt, Giant LO-TO splittings in perovskite ferroelectrics. Phys Rev Lett. 72, 3618–3621 (1994).
   PubMed Web of Science ®Google Scholar
• G.H. Kwei, A.C. Lawson, S.J. L. Billinge, and S.W. Cheong, Structures of the ferroelectric phases of barium titanate. J Phys Chem. 97, 2368–2377 (1993).
   Web of Science ®Google Scholar