The electrical conductivity of the surface layers of oxide polycrystalline semiconductors irradiated by accelerated ions

Abstract

The effect of ion irradiation on the electrical conductivity of low resistance and high resistance subsurface layers of polycrystalline Li-Ti ferrites is studied. Irradiation was carried out with accelerated Ar+ ions with energy E=150 keV and the fluence F = 1016 ions/cm2. It is found that exposure of high-resistance ferrites significantly decreases the activation energy E<inf>σ</inf> and considerably increases the electrical conductivity of the surface layers. The effect of the ion beam on the stated low-resistance characteristics of the samples is much weaker. The observed decrease in the numerical values of E<inf>σ</inf> is due to the decrease in the values of the intergranular potential barrier caused by the exposure. The decrease in the potential barrier difference is due to the decreased degree of the grain boundary oxidation which is caused by preferential desorption of oxygen under the action of the ion beam. The thermal stability of the electrical characteristics of the investigated ferrites subjected to ion radiation-induced modification is determined.

Original language	English
Title of host publication	IOP Conference Series: Materials Science and Engineering
Publisher	Institute of Physics Publishing
Volume	81
Edition	1
DOIs	https://doi.org/10.1088/1757-899X/81/1/012026
Publication status	Published - 23 Apr 2015
Event	International Scientific Conference on Radiation-Thermal Effects and Processes in Inorganic Materials, RTEP 2014 - Tomsk, Russian Federation Duration: 3 Nov 2014 → 8 Nov 2014

Other

Other	International Scientific Conference on Radiation-Thermal Effects and Processes in Inorganic Materials, RTEP 2014
Country	Russian Federation
City	Tomsk
Period	3.11.14 → 8.11.14

ASJC Scopus subject areas

Engineering(all)
Materials Science(all)

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10.1088/1757-899X/81/1/012026

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The electrical conductivity of the surface layers of oxide polycrystalline semiconductors irradiated by accelerated ions. / Frangulyan, T. S.; Ghyngazov, S. A.; Kaz, S. M.

IOP Conference Series: Materials Science and Engineering. Vol. 81 1. ed. Institute of Physics Publishing, 2015. 012026.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Frangulyan, TS, Ghyngazov, SA & Kaz, SM 2015, The electrical conductivity of the surface layers of oxide polycrystalline semiconductors irradiated by accelerated ions. in IOP Conference Series: Materials Science and Engineering. 1 edn, vol. 81, 012026, Institute of Physics Publishing, International Scientific Conference on Radiation-Thermal Effects and Processes in Inorganic Materials, RTEP 2014, Tomsk, Russian Federation, 3.11.14. https://doi.org/10.1088/1757-899X/81/1/012026

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title = "The electrical conductivity of the surface layers of oxide polycrystalline semiconductors irradiated by accelerated ions",

abstract = "The effect of ion irradiation on the electrical conductivity of low resistance and high resistance subsurface layers of polycrystalline Li-Ti ferrites is studied. Irradiation was carried out with accelerated Ar+ ions with energy E=150 keV and the fluence F = 1016 ions/cm2. It is found that exposure of high-resistance ferrites significantly decreases the activation energy Eσ and considerably increases the electrical conductivity of the surface layers. The effect of the ion beam on the stated low-resistance characteristics of the samples is much weaker. The observed decrease in the numerical values of Eσ is due to the decrease in the values of the intergranular potential barrier caused by the exposure. The decrease in the potential barrier difference is due to the decreased degree of the grain boundary oxidation which is caused by preferential desorption of oxygen under the action of the ion beam. The thermal stability of the electrical characteristics of the investigated ferrites subjected to ion radiation-induced modification is determined.",

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AU - Frangulyan, T. S.

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Y1 - 2015/4/23

N2 - The effect of ion irradiation on the electrical conductivity of low resistance and high resistance subsurface layers of polycrystalline Li-Ti ferrites is studied. Irradiation was carried out with accelerated Ar+ ions with energy E=150 keV and the fluence F = 1016 ions/cm2. It is found that exposure of high-resistance ferrites significantly decreases the activation energy Eσ and considerably increases the electrical conductivity of the surface layers. The effect of the ion beam on the stated low-resistance characteristics of the samples is much weaker. The observed decrease in the numerical values of Eσ is due to the decrease in the values of the intergranular potential barrier caused by the exposure. The decrease in the potential barrier difference is due to the decreased degree of the grain boundary oxidation which is caused by preferential desorption of oxygen under the action of the ion beam. The thermal stability of the electrical characteristics of the investigated ferrites subjected to ion radiation-induced modification is determined.

AB - The effect of ion irradiation on the electrical conductivity of low resistance and high resistance subsurface layers of polycrystalline Li-Ti ferrites is studied. Irradiation was carried out with accelerated Ar+ ions with energy E=150 keV and the fluence F = 1016 ions/cm2. It is found that exposure of high-resistance ferrites significantly decreases the activation energy Eσ and considerably increases the electrical conductivity of the surface layers. The effect of the ion beam on the stated low-resistance characteristics of the samples is much weaker. The observed decrease in the numerical values of Eσ is due to the decrease in the values of the intergranular potential barrier caused by the exposure. The decrease in the potential barrier difference is due to the decreased degree of the grain boundary oxidation which is caused by preferential desorption of oxygen under the action of the ion beam. The thermal stability of the electrical characteristics of the investigated ferrites subjected to ion radiation-induced modification is determined.

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