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Title: Analysis of the nature of electrical conductivity in nominally undoped LiNbO{sub 3} crystals

The temperature dependence of electrical conductivity and admittance of two nominally undoped lithium niobate crystals of congruent composition has been investigated in the temperature range of 293–450 K and simulated in the range of 350–700 K. It is shown that the ion conductivity at T < 450 K is mainly determined by OH{sup −} groups; however, some other mechanisms may manifest themselves at higher temperatures; a likely one is diffusion of oxygen vacancies, which leads to an increase in the “averaged” conductivity activation energy.
Authors:
; ;  [1]
  1. Vernadsky Taurida National University (Russian Federation)
Publication Date:
OSTI Identifier:
22472404
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 60; Journal Issue: 2; Other Information: Copyright (c) 2015 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; ACTIVATION ENERGY; CRYSTALS; DIFFUSION; IONIC CONDUCTIVITY; LITHIUM; LITHIUM COMPOUNDS; NIOBATES; NIOBIUM OXIDES; OXYGEN; TEMPERATURE DEPENDENCE; VACANCIES