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High-Tc Superconducting Films Irradiated with Low-Energy Oxygen Ion Beam

Published online by Cambridge University Press:  25 February 2011

V. V. Phedotova ,
A. V. Zoubetz ,
A. P. Ges  and
A. I. Stognij
V. V. Phedotova
Affiliation:
Institute of Solid State and Semiconductor Physics, P. Brovki 17, Minsk 220072, Republic of Belarus.
A. V. Zoubetz
Affiliation:
Institute of Solid State and Semiconductor Physics, P. Brovki 17, Minsk 220072, Republic of Belarus.
A. P. Ges
Affiliation:
Institute of Solid State and Semiconductor Physics, P. Brovki 17, Minsk 220072, Republic of Belarus.
A. I. Stognij
Affiliation:
Institute of Solid State and Semiconductor Physics, P. Brovki 17, Minsk 220072, Republic of Belarus.
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Abstract

LPE-grown YBCO single crystal films were irradiated with oxygen ion beam up to a fluence level of 8 × 1019 cm−2 Irradiation parameters were as follows: , beam energy 0.8 keV, current density 0.4 mA/cm2. Ultimate vacuum was not less than 5 × 10−6 Torr, operating vacuum was 2 × 10−4 Torr. Tc = 53K and transition width ΔT> 10 K characterized the starting state of the films. After irradiation Tc was found to increase up to 94 K and Δ to decrease down to 0.5 K. Proceeding from transition character one can conclude that the irradiated film composition was changing into a single phase one. Half widths of the characteristic peaks of x-ray spectra were decreasing with the increase in fluence. The best results were obtained upon the irradiation of cooled samples. Upon heating the samples up to 600° C it was impossible to obtain Tc = 86 k and ΔT = 2 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 279: Symposium A – Beam-Solid Interactions–Fundamentals and Applications , 1992 , 43
Copyright
Copyright © Materials Research Society 1993

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References

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