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Volumn 112, Issue 9, 2008, Pages 3434-3438

Effect of bond covalency on the lattice stability and fatigue behavior of ferroelectric bismuth transition-metal oxides

Author keywords

[No Author keywords available]

Indexed keywords

BISMUTH COMPOUNDS; FATIGUE OF MATERIALS; FERROELECTRIC MATERIALS; TRANSITION METALS;

EID: 41749090013     PISSN: 19327447     EISSN: 19327455     Source Type: Journal    
DOI: 10.1021/jp711283s     Document Type: Article
Times cited : (8)

References (20)
  • 9
    • 41749086998 scopus 로고    scopus 로고
    • Lattice parameters for BTT (a, 5.421 Å, b, 4.945 Å,c, 23.974 Å, Ar-BTT (a, 5.444 Å, b, 4.978 Å, c, 24.121 Å, Li-BTT (a, 5.431 Å, b, 4.971 Å, c, 24.000 Å, SBT (a, 3.897 Å, b, 3.902 Å, c, 24.986 Å, Ar-SBT (a, 3.900 A, b, 3.904 Å, c, 24.967 Å, Li-SBT (a, 3.912 ̊, b, 3.906 Å, c, 25.005 Å, BTO (a, 5.407 Å, b, 5.437 Å, c, 32.826 Å, Ar-BTO (a, 5.411 Å, b, 5.444 Å, c, 32.849 Å, and Li-BTO a, 5.414 Å, b, 5.449 Å, c, 32.790 Å
    • Lattice parameters for BTT (a = 5.421 Å, b = 4.945 Å,c = 23.974 Å), Ar-BTT (a = 5.444 Å, b = 4.978 Å, c = 24.121 Å), Li-BTT (a = 5.431 Å, b = 4.971 Å, c = 24.000 Å), SBT (a = 3.897 Å, b = 3.902 Å, c = 24.986 Å), Ar-SBT (a = 3.900 A, b = 3.904 Å, c = 24.967 Å), Li-SBT (a = 3.912 ̊, b = 3.906 Å, c = 25.005 Å), BTO (a = 5.407 Å, b = 5.437 Å, c = 32.826 Å), Ar-BTO (a = 5.411 Å, b = 5.444 Å, c = 32.849 Å), and Li-BTO (a = 5.414 Å, b = 5.449 Å, c = 32.790 Å).
  • 14
    • 41749084501 scopus 로고    scopus 로고
    • On the basis of the higher oxidation state of the Tav ion than the TiIV ion, the former is reasonably expected to be more electronegative than the latter because the electronegativity becomes higher with the increase of the oxidation state. This expectation is further supported by the fact that a neutral tantalum element has nearly the same electronegativity as the divalent titanium ion (χPauling(Ta 0, 1.5, χPauling(O-II, 1.54; χPauling(O-II, 3.4, ref 12, Using the Pauling's formula for (a-b) bond ionicity (I) calculation, I=1- exp[-1/4(χa, χb)2, the bond ionicity is expected to be smaller for (Tav-O) bonds than for (TiIV-O) bonds, implying the greater covalency for the former bonds
    • IV-O) bonds, implying the greater covalency for the former bonds.
  • 16
    • 41749106313 scopus 로고    scopus 로고
    • Peaks positions for BTT (A, 9881.2 eV; B, 9886.0 eV; ΔE = 4.8 eV), Ar-BTT (A, 9881.0 eV; B, 9885.7 eV; ΔE = 4.7 eV), Li-BTT (A, 9881.0 eV; B, 9885.7 eV; ΔE = 4.7 eV), SBT (A, 9881.8 eV; B, 9886.3 eV; ΔE = 4.5 eV), Ar-SBT (A, 9881.7 eV; B, 9886.2 eV; ΔE = 4.5 eV), and Li-SBT (A, 9881.6 eV; B, 9885.8 eV; ΔE = 4.2 eV). The standard deviation of the peak positions is ±0.1 eV
    • Peaks positions for BTT (A, 9881.2 eV; B, 9886.0 eV; ΔE = 4.8 eV), Ar-BTT (A, 9881.0 eV; B, 9885.7 eV; ΔE = 4.7 eV), Li-BTT (A, 9881.0 eV; B, 9885.7 eV; ΔE = 4.7 eV), SBT (A, 9881.8 eV; B, 9886.3 eV; ΔE = 4.5 eV), Ar-SBT (A, 9881.7 eV; B, 9886.2 eV; ΔE = 4.5 eV), and Li-SBT (A, 9881.6 eV; B, 9885.8 eV; ΔE = 4.2 eV). The standard deviation of the peak positions is ±0.1 eV


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