On the effect of structural and symmetrical features of potassium titanyl phosphate crystals with different contents of niobium, antimony, and zirconium on the second-harmonic intensity (original) (raw)

Abstract

A model is proposed, which shows that, at small deviations from the centrosymmetric state of the atomic structure, the quadratic nonlinear susceptibility of a crystal monotonically decreases with approach of the degree of central symmetry \( \eta _{\overline 1 } \)[φ(r)] of the electric potential function of the crystal structure to unity. The quadratic nonlinear susceptibility of K1 − x Ti1 − x Nb x OPO4 (x = 0, 0.02, 0.04, 0.11), K1 − x Ti1 − x Sb x OPO4 (x = 0.01, 0.07, 0.17), and KTi1 − x Zr x OPO4 (x = 0.03, 0.04) crystals has been measured. The degree of central symmetry \( \eta _{\overline 1 } \)[φ(r)] has been calculated for the structures of K1 − x Ti1 − x Nb x OPO4 (x = 0, 0.04, 0.11), K1 − x Ti1 − x Sb x OPO4 (x = 0.01, 0.07, 0.17), and KTi1 − x Zr x OPO4 (x = 0.03, 0.04) crystals. It is shown that, at \( \eta _{\overline 1 } \)[φ(r)] > 0.7, the relationship between the quadratic nonlinear susceptibility of the investigated crystals and the degree of their central symmetry \( \eta _{\overline 1 } \)[φ(r)] is in qualitative agreement with the proposed model.

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Authors and Affiliations

  1. Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia
    V. A. Ivanov, V. A. Burdov, M. O. Marychev, D. N. Titaev, M. A. Faddeev & E. V. Chuprunov

Authors

  1. V. A. Ivanov
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  2. V. A. Burdov
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  3. M. O. Marychev
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  4. D. N. Titaev
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  5. M. A. Faddeev
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  6. E. V. Chuprunov
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Correspondence toV. A. Ivanov.

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Original Russian Text © V.A. Ivanov, V.A. Burdov, M.O. Marychev, D.N. Titaev, M.A. Faddeev, E.V. Chuprunov, 2008, published in Kristallografiya, 2008, Vol. 53, No. 4, pp. 714–719.

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Ivanov, V.A., Burdov, V.A., Marychev, M.O. et al. On the effect of structural and symmetrical features of potassium titanyl phosphate crystals with different contents of niobium, antimony, and zirconium on the second-harmonic intensity.Crystallogr. Rep. 53, 678–682 (2008). https://doi.org/10.1134/S1063774508040202

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