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Defects and Their Distribution in KH2PO4 Crystals with Embedded TiO2 Nanoparticles

Published online by Cambridge University Press:  07 May 2015

Valentin Grachev ,
Romand Tse ,
Ian Vrable ,
Igor Pritula ,
Olga Bezkrovnaya ,
Anna Kosinova ,
Vasyl Yatsyna ,
Vladimir Gayvoronsky  and
Galina Malovichko
Valentin Grachev
Affiliation:
Physics Department, Montana State University, Bozeman, 264 EPS bldg., MT 59717, U.S.A.
Romand Tse
Affiliation:
Physics Department, Montana State University, Bozeman, 264 EPS bldg., MT 59717, U.S.A.
Ian Vrable
Affiliation:
Physics Department, Montana State University, Bozeman, 264 EPS bldg., MT 59717, U.S.A.
Igor Pritula
Affiliation:
Institute for Single Crystals, NAS of Ukraine, Lenin ave., 60, 61001, Kharkіv, Ukraine
Olga Bezkrovnaya
Affiliation:
Institute for Single Crystals, NAS of Ukraine, Lenin ave., 60, 61001, Kharkіv, Ukraine
Anna Kosinova
Affiliation:
Institute for Single Crystals, NAS of Ukraine, Lenin ave., 60, 61001, Kharkіv, Ukraine
Vasyl Yatsyna
Affiliation:
Institute of Physics, NAS of Ukraine, Nauki ave., 46, 03680 Kiev, Ukraine
Vladimir Gayvoronsky
Affiliation:
Institute of Physics, NAS of Ukraine, Nauki ave., 46, 03680 Kiev, Ukraine
Galina Malovichko
Affiliation:
Physics Department, Montana State University, Bozeman, 264 EPS bldg., MT 59717, U.S.A.
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Abstract

Results from the successful growth of high quality KH2PO4 (KDP) crystals with incorporated TiO2 anatase nanoparticles and the characterization of these crystals using several complementary methods are presented. Transmission and scanning electron microscopy have shown that the anatase nanoparticles were captured mainly by the pyramidal growth sector and, to a considerably lesser extent, by the prismatic growth sector. Energy dispersive x-ray analysis confirms that the growth layer stacks contain the TiO2 particles. Significant variation in the imaginary and real parts of the cubic nonlinear optical susceptibilities and refractive index changes at continuous wave excitation were found in prism and pyramid parts of pure KDP and KDP:TiO2 samples. The identified lines of electron paramagnetic resonance belong to four different centers FeA3+, FeB3+, CrR3+ and CrGB3+. From analysis of line intensities it was concluded that the concentration of non-controlled impurities in nominally pure KDP samples is several times larger than in KDP:TiO2, and that the concentration of non-controlled impurities in the prismatic part of the KDP:TiO2 boule is larger than in the pyramidal part.

Keywords

crystal growthnanostructureelectron spin resonance
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1806: Symposium UU – Titanium Oxides―From Fundamental Understanding to Applications , 2015 , pp. 13 - 18
Copyright
Copyright © Materials Research Society 2015 

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References

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