Structure and Properties of Antimony-Doped Potassium Titanyl Phosphate Single Crystals

Journal Article · Fri Jul 15 04:00:00 EDT 2005 · Crystallography Reports

DOI:https://doi.org/10.1134/1.1996729· OSTI ID:20719204

Alekseeva, O A; Sorokina, N I; Verin, I A; Simonov, V I ^[1]; Krotova, O D; Losevskaya, T Yu; Voronkova, V I; Yanovskii, V K ^[2]

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1. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333 (Russian Federation)
2. Moscow State University, Vorob'evy gory, Moscow, 119992 (Russian Federation)

Antimony-doped potassium titanyl phosphate (KTP) crystals of the composition KTiOPO{sub 4} are studied by X-ray diffraction analysis. It is shown that, with an increase of antimony content in KTP crystals, the occupancies of potassium positions change and new additional positions for potassium atoms arise. The formation of additional vacancies and splitting of the potassium-cation positions explain the considerable decrease in the temperature of the ferroelectric phase transition, enhancement of the relaxation phenomena, and an increase in electric conductivity of antimony-doped KTP crystals. Substitution of antimony atoms for titanium is accompanied by elongation of short and shortening of long Ti-O bonds in the TiO{sub 6} octahedra, processes which result in lower intensity of second-harmonic generation in laser-irradiated KTP crystals.

• OSTI ID: 20719204
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 4 Vol. 50; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIMONY
BOND LENGTHS
CATIONS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELONGATION
FERROELECTRIC MATERIALS
HARMONIC GENERATION
LASERS
MONOCRYSTALS
PHASE TRANSFORMATIONS
PHOSPHATES
POTASSIUM COMPOUNDS
RELAXATION
TITANIUM COMPOUNDS
VACANCIES
X-RAY DIFFRACTION