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Title: Features of the structural states of KNbO{sub 3} single crystals before and after fast-neutron irradiation

Abstract

Neutron irradiation is a unique tool for forming new structural states of ferroelectrics, which cannot be obtained by conventional methods. The inf luence of the irradiation by two doses of fast neutrons (F = 1 × 10{sup 17} and 3 × 10{sup 17} cm{sup –2}) on the structure and properties of KNbO{sub 3} single crystals has been considered for the first time. The developed method for taking into account the experimental correction to the diffuse scattering has been used to analyze the structural changes occurring in KNbO{sub 3} samples at T = 295 K and their correlations with the behavior of dielectric and nonlinear optical characteristics. The irradiation to the aforementioned doses retains the KNbO{sub 3} polar structure, shifting Т{sub Ð}¡ to lower temperatures and significantly affecting only the thermal parameters and microstructure of single crystals. Neutron irradiation with small atomic displacements provides a structure similar to the high-temperature modification of an unirradiated KNbO{sub 3} crystal.

Authors:
; ; ; ; ; ; ;  [1]
  1. State Scientific Center of the Russian Federation Karpov Institute of Physical Chemistry (Russian Federation)
Publication Date:
OSTI Identifier:
22645266
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 62; Journal Issue: 1; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMIC DISPLACEMENTS; DIFFUSE SCATTERING; FAST NEUTRONS; FERROELECTRIC MATERIALS; MICROSTRUCTURE; MONOCRYSTALS; NIOBATES; NONLINEAR PROBLEMS

Citation Formats

Stash, A. I., E-mail: astas@yandex.ru, Ivanov, S. A., Stefanovich, S. Yu., Mosunov, A. V., Boyko, V. M., Ermakov, V. S., Korulin, A. V., and Kalyukanov, A. I. Features of the structural states of KNbO{sub 3} single crystals before and after fast-neutron irradiation. United States: N. p., 2017. Web. doi:10.1134/S1063774517010230.
Stash, A. I., E-mail: astas@yandex.ru, Ivanov, S. A., Stefanovich, S. Yu., Mosunov, A. V., Boyko, V. M., Ermakov, V. S., Korulin, A. V., & Kalyukanov, A. I. Features of the structural states of KNbO{sub 3} single crystals before and after fast-neutron irradiation. United States. doi:10.1134/S1063774517010230.
Stash, A. I., E-mail: astas@yandex.ru, Ivanov, S. A., Stefanovich, S. Yu., Mosunov, A. V., Boyko, V. M., Ermakov, V. S., Korulin, A. V., and Kalyukanov, A. I. Sun . "Features of the structural states of KNbO{sub 3} single crystals before and after fast-neutron irradiation". United States. doi:10.1134/S1063774517010230.
@article{osti_22645266,
title = {Features of the structural states of KNbO{sub 3} single crystals before and after fast-neutron irradiation},
author = {Stash, A. I., E-mail: astas@yandex.ru and Ivanov, S. A. and Stefanovich, S. Yu. and Mosunov, A. V. and Boyko, V. M. and Ermakov, V. S. and Korulin, A. V. and Kalyukanov, A. I.},
abstractNote = {Neutron irradiation is a unique tool for forming new structural states of ferroelectrics, which cannot be obtained by conventional methods. The inf luence of the irradiation by two doses of fast neutrons (F = 1 × 10{sup 17} and 3 × 10{sup 17} cm{sup –2}) on the structure and properties of KNbO{sub 3} single crystals has been considered for the first time. The developed method for taking into account the experimental correction to the diffuse scattering has been used to analyze the structural changes occurring in KNbO{sub 3} samples at T = 295 K and their correlations with the behavior of dielectric and nonlinear optical characteristics. The irradiation to the aforementioned doses retains the KNbO{sub 3} polar structure, shifting Т{sub Ð}¡ to lower temperatures and significantly affecting only the thermal parameters and microstructure of single crystals. Neutron irradiation with small atomic displacements provides a structure similar to the high-temperature modification of an unirradiated KNbO{sub 3} crystal.},
doi = {10.1134/S1063774517010230},
journal = {Crystallography Reports},
number = 1,
volume = 62,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2017},
month = {Sun Jan 15 00:00:00 EST 2017}
}