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Structure and properties of antimony-doped potassium titanyl phosphate single crystals

机译：锑掺杂钛氧钛酸钾单晶的结构与性能

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摘要

Antimony-doped potassium titanyl phosphate (KTP) crystals of the composition KTiOPO4 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 TiO6 octahedra, processes which result in lower intensity of second-harmonic generation in laser-irradiated KTP crystals. (C) 2005 Pleiades Publishing, Inc.
机译：通过X射线衍射分析研究了组成为KTiOPO4的锑掺杂的磷酸氧钛钾（KTP）晶体。结果表明，随着KTP晶体中锑含量的增加，钾位置的占有率发生变化，钾原子又出现新的位置。额外的空位的形成和钾阳离子位置的分裂解释了铁电相变温度的显着降低，弛豫现象的增强以及掺锑KTP晶体的电导率的增加。钛原子中锑原子的替代伴随着TiO6八面体中Ti-O键的短时的延长和缩短，这些过程导致激光辐照的KTP晶体中二次谐波产生的强度降低。 （C）2005年Pleiades Publishing，Inc.

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