본문 바로가기
KERD
논문KCI 미등재

Direct Determination of Cationic Disordering in Sodium Bismuth Titanate

0

조회

0

다운로드

0

인용

0

참고문헌

키워드

주제분류자연과학일반

초록

The relaxor ferroelectric feature in lead-free perovskite oxides, where the dipoles are randomly oriented and they can be feasibly aligned parallel to the external bias, is attracting lots of attention in the field of piezoelectric materials science, since it is one of candidates to replace the toxic lead-based materials that are still being commercially used. However, the origin of relaxor characteristic and its related atomic structure are still ambiguous. In this study, Na1/2Bi1/2TiO3, chosen as a model relaxor system, was found to exhibit a cationic-disordered atomic structure; and furthermore the nonpolar atomic structure and its related oxygen tilting were ascertained via annular bright fi eld imaging skill. We also found that this cationic disordering gives rise to the local formation of atomic vacancies.

Abstract

The relaxor ferroelectric feature in lead-free perovskite oxides, where the dipoles are randomly oriented and they can be feasibly aligned parallel to the external bias, is attracting lots of attention in the field of piezoelectric materials science, since it is one of candidates to replace the toxic lead-based materials that are still being commercially used. However, the origin of relaxor characteristic and its related atomic structure are still ambiguous. In this study, Na1/2Bi1/2TiO3, chosen as a model relaxor system, was found to exhibit a cationic-disordered atomic structure; and furthermore the nonpolar atomic structure and its related oxygen tilting were ascertained via annular bright fi eld imaging skill. We also found that this cationic disordering gives rise to the local formation of atomic vacancies.

참고문헌 (45)

  1. Bao P, "Mechanical properties related to the relaxorferroelectric phase transition of titanium-doped lead magnesium niobate", Appl. Phys. Lett, 81, pp.2059~2061 (2002)
  2. Batson P E, "Sub-angstrom resolution using aberration corrected electron optics", Nature, 418, pp.617~620 (2002)
  3. Bokov A A, "Dielectric spectra and Vogel-Fulcher scaling in Pb(In0.5Nb0.5)O3 relaxor ferroelectric", J. Phys.: Condensed Matter, 11, pp.4899~4911 (1999)
  4. Burton B P, "Prediction of the Na1", 2Bi1, AIP Conference Proceedings in Fundamental Physics of Ferroelectrics, pp.2001, 582[DOI]
  5. Chiang Y-M, "Lead-free highstrain single-crystal piezoelectrics in the alkaline–bismuth–titanate perovskite family", Appl. Phys. Lett, 73, pp.3683~3685 (1998)
  6. Choi S-Y, "Direct determination of dopant site selectivity in ordered perovskite CaCu3Ti4O12 polycrystals by aberration-corrected STEM", Adv. Mater, 21, pp.885~889 (2009)
  7. Choi S-Y, "Gigantic electrostrain in duplex structured alkaline niobates", Chem. Mater, 24, pp.3363~3369 (2012)
  8. Chu F, "The spontaneous relaxorferroelectric transition of Pb(Sc0.5Ta0.5)O3", J. Appl. Phys, 74, pp.5219~5134 (1993)
  9. Chung S-Y, "Atomic-scale visualization of antisite defects in LiFePO4", Phys. Rev. Lett, 100, pp.125502-1~125502-4 (2008)
  10. Chung S-Y, "Orientation- Dependent Arrangement of Antisite Defects in Lithium Iron(II) Phosphate Crystals", Angew. Chem. Int. Ed, 48, pp.543~546 (2009)
  11. Dai X, "The spontaneous relaxor to normal ferroelectric transformation in La-modified lead zirconate titanate", Phil. Mag. B, 71, pp.33~38 (1994)
  12. Dorcet V, "Reinvestigation of phase transitions in Na0.5Bi0.5TiO3 by TEM. Part I: First order rhomboheral to orthorhombic phase transition", Chem. Mater, 20, pp.5061~5073 (2008)
  13. Dorcet V, "Reinvestigation of phase transitions in Na0.5Bi0.5TiO3 by TEM. Part II: Second order orhorhombic to tetragonal phase transition", Chem. Mater, 20, pp.5074~5082 (2008)
  14. Dorcet V, "A transmission electron microscopy study of the A-site disordered perovskite Na0.5Bi0.5TiO3", Acta. Mater, 56, pp.1753~1761 (2008)
  15. Findlay S D, "Dynamics of annular bright field imaging in scanning transmission electron microscopy", Ultramicroscopy, 110, pp.903~923 (2010)
  16. Haider M, "Electron microscopy image enhanced", Nature, 392, pp.768~769 (1998)
  17. Hovden R, "Extended depth of field for high-resolution scanning transmission electron microscopy", Microsc. Microanal, 17, pp.75~80 (2010)
  18. Ishikawa R, "Direct imaging of hydrogen-atom columns in a crystal by annular bright-fi eld electron microscopy", Nature Mater, 10, pp.278~281 (2010)
  19. Jia C L, "Atomicscale study of electric dipoles near charged an uncharged domain walls in ferroelectric films", Nature Mater, 7, pp.57~61 (2008)
  20. Jones G O, "The tetragonal phase of Na0.5Bi0.5TiO3– a new variant of the perovskite structure", Acta. Cryst. B, 56, pp.426~430 (2000)
  21. Jones G O, "Investigation of the structure and phase transitions in the novel A-site substituted distorted perovskite compound Na0.5Bi0.5TiO3", Acta. Cryst. B, 58, pp.168~178 (2002)
  22. Klie R F, "Atomic scale characterization of oxygen vacancy segregation at SrTiO3 grain boundaries", Appl. Phys. Lett, 87, pp.3737~3739 (2000)
  23. Kreisel J, "High-pressure Raman study of a relaxor ferroelectric: the Na1", 2Bi1, Phys. Rev. B, pp.2001, 63[DOI]
  24. Kreisel J, "An x-ray diffraction and Raman spectroscopy investigation ofA-site substituted perovskite compounds: the (Na1-xKx)0.5Bi0.5TiO3(0 < x < 1) solid solution", J. Phys.: Condensed Matter, 12, pp.3627~3280 (2000)
  25. Krunmins A, "Spontaneous trasition between relaxor and ferroelectric states in lanthanum-modifi ed lead zirconate titanate (6–7)", 65, Jpn. J. Appl. Phys, pp.1994, 33[DOI]
  26. Levin I, "Nano-and mesoscale structure of Na1", 2Bi1, Adv. Func. Mater, pp.2012, 22[DOI]
  27. Lupini A R, "Aberration corrected imaging in the STEM", Microsc. Microanal, 13, pp.1146~1147 (2007)
  28. Mizoguchi T, "Theoretical ELNES using one-particle and multi-particle calculations", Micron, 41, pp.695~709 (2010)
  29. Muller D A, "Atomic-scale imaging of nanoengineered oxygen vacancy profi les in SrTiO3", Nature, 430, pp.657~661 (2004)
  30. Nellist P D, "Direct sub-angstrom imaging of a crystal lattice", Science, 305, pp.1741~ (2004)
  31. Okunishi E, "Visualization of light elements at ultrahigh resolution by STEMannular bright fi eld microscopy", Microsc. Microanal, 15, pp.164~165 (2009)
  32. Park S-E, "Nonstoichiometry and the long-range cation ordering in crystals of (Na1", 2Bi1, J. Am. Ceram. Soc, pp.1994, 77[DOI]
  33. Petzelt J, "Infrared, Raman and high-frequency dielectric sspectroscopy and the phase transition in Na1", 2Bi1, J. Phys.: Condensed Matter, pp.2004, 16[DOI]
  34. Sciau P, "X-ray diffraction study of BaTi0.65Zr0.35O3 and Ba0.92Ca0.08Ti0.75Zr0.25O3 compositions: infl uence of electric field", Sol. Stat. Commun, 113, pp.77~82 (2000)
  35. Simon A, "The crossover from a ferroelectric to a relaxor state in lead-free solid solutions", J. Phys.: Condensed Matter, 16, pp.963~ (2004)
  36. Siny G, "The phase transition dynamics in Na1", 2Bi1, Ferroelectrics, pp.1991, 124[DOI]
  37. Smolenskii G A, "New ferroelectrics of complex composition", Sov. Phys. Solid State, 2, pp.2651~2654 (1961)
  38. Smolenskii G A, "Ferroelectrics with diffuse phase transitions", Sov. Phys. Solid State, 2, pp.2584~2594 (1961)
  39. Tagantsev A K, "Mechanism of polarization response in the ergodic phase of a relaxor ferroelectric", Phys. Rev. B, 57, pp.18~21 (1998)
  40. Tai C W, "Nanoscale oxygen octahedral tilting in0.90(Bi1", 2Na1, 2K1, pp.2)TiO3–0.05BaTiO3 leadfreeperovskite piezoelectric ceramics, Appl. Phys. Lett[DOI]
  41. Tu C S, "Brillouin scattering in Na1", 2Bi1, Ferroelectrics, pp.1994, 152[DOI]
  42. Vakhrushev S B, "Phase transition and soft modes in sodium bismuth titanate", Ferroelectrics, 63, pp.153~160
  43. Xu Y-N, "Electronic structure of Na1", 2Bi1, Phy. Mag. B, pp.2000, 80[DOI]
  44. Yao J, "The infl uence of Mn substitution on the local structure of Na0.5Bi0.5TiO3 crystals: increased ferroelectric ordering and coexisting octahedral tilts", J. Appl. Phys, 111, pp.064109-1~064109-6 (2012)
  45. Yasuda N, "Dielectric properties and phase transitions of Ba(Ti1-xSnx)O3 solid solution", Jpn. J. Appl. Phys, 35, pp.5099~ (1996)

관련 논문AI추천

이 간행물의 다른 논문 (9건)