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Effect of doping on the radiation response of conductive Nb–SrTiO3

Li, Weixing ; Rodriguez, Matias D. ; Kluth, Patrick ; Lang, Maik ; Medvedev, Nikita ; Sorokin, Michael ; Zhang, Jiaming ; Afra, Boshra ; Bender, Markus ; Severin, Daniel ; Trautmann, Christina ; Ewing, Rodney C. (2013)
Effect of doping on the radiation response of conductive Nb–SrTiO3.
In: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 302
doi: 10.1016/j.nimb.2013.03.010
Article, Bibliographie

Abstract

Based on the Coulomb spike model, track formation depends strongly on the electrical resistivity of a material, and ion tracks form only in insulating materials. However, there are no systemic studies of the effect of resistivity on the track formation in materials, such as SrTiO3 (STO), where with the addition of low concentrations of Nb, the resistivity dramatically decreases covering the entire electronic regime from an insulating to conducting material. In this study, high energy (8.6 MeV/u) ion-induced track formation in STO was characterized by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) techniques as a function of Nb-doping concentrations. Contrary to the Coulomb spike model’s predictions, the Nb-doping had no evident influence on track formation, as confirmed by both TEM and SAXS. This may be the result of the low electron density in the bulk material or the minor effect of the Nb-doping on the bonding in the material. In situ TEM studies of low energy (1 MeV Kr2+) ion irradiations show that the low concentration doping has a minor influence on the crystalline-to-amorphous transformation as a result of subtle structural variations of incorporated impurity atoms.

Item Type: Article
Erschienen: 2013
Creators: Li, Weixing ; Rodriguez, Matias D. ; Kluth, Patrick ; Lang, Maik ; Medvedev, Nikita ; Sorokin, Michael ; Zhang, Jiaming ; Afra, Boshra ; Bender, Markus ; Severin, Daniel ; Trautmann, Christina ; Ewing, Rodney C.
Type of entry: Bibliographie
Title: Effect of doping on the radiation response of conductive Nb–SrTiO3
Language: English
Date: 1 May 2013
Publisher: Elsevier
Journal or Publication Title: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume of the journal: 302
DOI: 10.1016/j.nimb.2013.03.010
Abstract:

Based on the Coulomb spike model, track formation depends strongly on the electrical resistivity of a material, and ion tracks form only in insulating materials. However, there are no systemic studies of the effect of resistivity on the track formation in materials, such as SrTiO3 (STO), where with the addition of low concentrations of Nb, the resistivity dramatically decreases covering the entire electronic regime from an insulating to conducting material. In this study, high energy (8.6 MeV/u) ion-induced track formation in STO was characterized by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) techniques as a function of Nb-doping concentrations. Contrary to the Coulomb spike model’s predictions, the Nb-doping had no evident influence on track formation, as confirmed by both TEM and SAXS. This may be the result of the low electron density in the bulk material or the minor effect of the Nb-doping on the bonding in the material. In situ TEM studies of low energy (1 MeV Kr2+) ion irradiations show that the low concentration doping has a minor influence on the crystalline-to-amorphous transformation as a result of subtle structural variations of incorporated impurity atoms.

Uncontrolled Keywords: track formation, amorphization, SrTiO3, non-thermal process, thermal spike, conductivity
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
Date Deposited: 18 Mar 2024 07:44
Last Modified: 18 Mar 2024 07:44
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