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
- Nizhni Novgorod State University (Russian Federation)
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} {sub 1}[{phi}(r)] of the electric potential function of the crystal structure to unity. The quadratic nonlinear susceptibility of K{sub 1-x}Ti{sub 1-x}Nb{sub x}OPO{sub 4} (x = 0, 0.02, 0.04, 0.11), K{sub 1} {sub -x}Ti{sub 1-x}Sb{sub x}OPO{sub 4} (x = 0.01, 0.07, 0.17), and KTi{sub 1-x}Zr{sub x}OPO{sub 4} (x = 0.03, 0.04) crystals has been measured. The degree of central symmetry {eta} {sub 1}[{phi}(r)] has been calculated for the structures of K{sub 1-x}Ti{sub 1-x}Nb{sub x}OPO{sub 4} (x = 0, 0.04, 0.11), K{sub 1-x}Ti{sub 1-x}Sb{sub x}OPO{sub 4} (x = 0.01, 0.07, 0.17), and KTi{sub 1} {sub -x}Zr{sub x}OPO{sub 4} (x = 0.03, 0.04) crystals. It is shown that, at {eta} {sub 1}[{phi}(r)] > 0.7, the relationship between the quadratic nonlinear susceptibility of the investigated crystals and the degree of their central symmetry {eta} {sub 1}[{phi}(r)] is in qualitative agreement with the proposed model.
- OSTI ID:
- 22050948
- Journal Information:
- Crystallography Reports, Vol. 53, Issue 4; Other Information: Copyright (c) 2008 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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