Effect of ion irradiation on electrical properties of lithium niobate single crystals doped by MgO

Abstract

The influence of MgO impurity on efficiency of conducting layers formation in LiNbO₃ crystals by ion bombardment was investigated. Pure LiNbO₃ (LN) and MgO:LiNbO₃(MLN) single crystals were irradiated by Ar⁺ions with energy 150 keV and fluence 10¹⁶ ions/cm². Ion irradiation results in increase of surface conductivity of LiNbO₃ crystals of all the investigated compositions more than by 6 orders. The opportunity of optical and electric properties change of LN by heat treatment in oxidation-reduction conditions was established. It is revealed, that there is a critical concentration of impurity [Mg]_C 5-6 mol % when physical properties of lithium niobate significantly are changed. The conductivity of ion-irradiated layer of LN and MLN crystals has electronic character. The basic mechanism of charge transfer in LiNbO₃ crystals with [Mg] < [Mg]_C is the hopping of charge carriers on the localized states. In crystals with [Mg] > [Mg]_C the conductivity is connected probably with carriers exited in nonlocalized states.

Original language	English
Pages (from-to)	94-96
Number of pages	3
Journal	Poverkhnost Rentgenovskie Sinkhronnye i Nejtronnye Issledovaniya
Issue number	8
Publication status	Published - 2005
Externally published	Yes

ASJC Scopus subject areas

Mechanical Engineering

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Bulycheva, A. A., & Pichugin, V. F. (2005). Effect of ion irradiation on electrical properties of lithium niobate single crystals doped by MgO. Poverkhnost Rentgenovskie Sinkhronnye i Nejtronnye Issledovaniya, (8), 94-96.

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title = "Effect of ion irradiation on electrical properties of lithium niobate single crystals doped by MgO",

abstract = "The influence of MgO impurity on efficiency of conducting layers formation in LiNbO3 crystals by ion bombardment was investigated. Pure LiNbO3 (LN) and MgO:LiNbO3(MLN) single crystals were irradiated by Ar+ions with energy 150 keV and fluence 1016 ions/cm2. Ion irradiation results in increase of surface conductivity of LiNbO3 crystals of all the investigated compositions more than by 6 orders. The opportunity of optical and electric properties change of LN by heat treatment in oxidation-reduction conditions was established. It is revealed, that there is a critical concentration of impurity [Mg]C 5-6 mol % when physical properties of lithium niobate significantly are changed. The conductivity of ion-irradiated layer of LN and MLN crystals has electronic character. The basic mechanism of charge transfer in LiNbO3 crystals with [Mg] < [Mg]C is the hopping of charge carriers on the localized states. In crystals with [Mg] > [Mg]C the conductivity is connected probably with carriers exited in nonlocalized states.",

author = "Bulycheva, {A. A.} and Pichugin, {V. F.}",

year = "2005",

language = "English",

pages = "94--96",

journal = "Poverkhnost Rentgenovskie Sinkhronnye i Nejtronnye Issledovaniya",

issn = "0207-3528",

publisher = "Izdatel'stvo Nauka",

number = "8",

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T1 - Effect of ion irradiation on electrical properties of lithium niobate single crystals doped by MgO

AU - Bulycheva, A. A.

AU - Pichugin, V. F.

PY - 2005

Y1 - 2005

N2 - The influence of MgO impurity on efficiency of conducting layers formation in LiNbO3 crystals by ion bombardment was investigated. Pure LiNbO3 (LN) and MgO:LiNbO3(MLN) single crystals were irradiated by Ar+ions with energy 150 keV and fluence 1016 ions/cm2. Ion irradiation results in increase of surface conductivity of LiNbO3 crystals of all the investigated compositions more than by 6 orders. The opportunity of optical and electric properties change of LN by heat treatment in oxidation-reduction conditions was established. It is revealed, that there is a critical concentration of impurity [Mg]C 5-6 mol % when physical properties of lithium niobate significantly are changed. The conductivity of ion-irradiated layer of LN and MLN crystals has electronic character. The basic mechanism of charge transfer in LiNbO3 crystals with [Mg] < [Mg]C is the hopping of charge carriers on the localized states. In crystals with [Mg] > [Mg]C the conductivity is connected probably with carriers exited in nonlocalized states.

AB - The influence of MgO impurity on efficiency of conducting layers formation in LiNbO3 crystals by ion bombardment was investigated. Pure LiNbO3 (LN) and MgO:LiNbO3(MLN) single crystals were irradiated by Ar+ions with energy 150 keV and fluence 1016 ions/cm2. Ion irradiation results in increase of surface conductivity of LiNbO3 crystals of all the investigated compositions more than by 6 orders. The opportunity of optical and electric properties change of LN by heat treatment in oxidation-reduction conditions was established. It is revealed, that there is a critical concentration of impurity [Mg]C 5-6 mol % when physical properties of lithium niobate significantly are changed. The conductivity of ion-irradiated layer of LN and MLN crystals has electronic character. The basic mechanism of charge transfer in LiNbO3 crystals with [Mg] < [Mg]C is the hopping of charge carriers on the localized states. In crystals with [Mg] > [Mg]C the conductivity is connected probably with carriers exited in nonlocalized states.

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