Structural aspects of nonlinear optics—Oxide systems ABOx

Bergman, J. G.; Crane, G. R.

doi:10.1016/0022-4596(75)90301-1

Cited by 46 publications

(23 citation statements)

References 20 publications

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“…Rb + and Cs + [6,7]. The occurrence of an inert or stereo-active lone-pair has profound implications for a variety of functional inorganic properties including second-order non-linear optical behavior and multiferroic behavior [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

New thallium iodates—Synthesis, characterization, and calculations of Tl(IO3)3 and Tl4(IO3)6, [Tl+3Tl3+(IO3)6]

Yeon

Kim

Halasyamani

2009

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 99%

New thallium iodates—Synthesis, characterization, and calculations of Tl(IO3)3 and Tl4(IO3)6, [Tl+3Tl3+(IO3)6]

Yeon

Kim

Halasyamani

2009

Journal of Solid State Chemistry

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“…A niobate structure is always more polarizable than its tantalate counterpart (28,38). Although oxygen is probably more polarizable in a niobate than a tantalate, the movement of the cores relative to each other is also significant.…”

Section: Pohrizability Enhancement 201mentioning

confidence: 96%

Polarizability Enhancement of Ionic Conductivity for A¹⁺ in A¹⁺M₂X₆ Series

Sleight

Gulley

Berzins

1977

Advances in Chemistry

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framework is related to the polarizability of M-X bonds. The influence of polarizability in β-alumina and anion con ductors is also discussed.Tn a search for new materials exhibiting fast ion transport, various thoughts have been expressed concerning the structural and chemical requirements for such materials. The structural features have generally been stressed; however, there are other important considerations.The difficulty in assessing factors other than structural is that one must subdue the geometric effects which generally appear to dominate. This is done by comparing the ionic conductivity of ions with nearly identical sizes (e.g., Li + vs. Cu + or Rb + vs. Tl + ) in the same structure.Although some data exist on the relative mobilities of Tl + and Rb + in /3-alumina, a comparison in this structure is hindered by the complex behavior of Rb-/?-alumina (I). Another approach is to change the chemistry of a host structure without significantly altering its geometry.The effect of this nongeometric change could then be directly established.A family of compounds with the general formula AM2Xe having a pyrochlore-related structure was discovered by Babel et al. (2) in 1967. This is an (M2Xe)" framework structure formed by corner-sharing MXe 195Downloaded by UNIV OF BATH on July 4, 2016 |

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“…On the other hand, one may obtain the bond polarizabilities (3ijk from the measured values of the nonlinear susceptibilities (or electronic Pockels coefficients), and so establish some connection between the electronic structure and the electrooptic response. As an example, Table 5.2 shows the second-order polarizabilities (311 and (3.l for several oxide bonds [13], inferred from XVk (or dij) by using (5.1). The superior performance of niobates and titanates is clearly apparent.…”

Section: Bond Anharmonic Polarizability Descriptionsmentioning

confidence: 99%

“…For displacive ferroelectrics, the rise in the dielectric constants Eij near the phase transition is caused by the strong lattice polarization associated with the ferroelectric soft mode [13]. Therefore, it is expected that the coupling between this polar mode and the electron dynamics will provide a dominant contribution to the rJk and rtk values well above the purely electronic term rijk.…”

Section: Effects Related To the Ferroelectric Transitionmentioning

confidence: 99%